Miners Get Paid Twice: The Drivechain Fee Compounding Effect
There is a number Bitcoiners do not like to talk about. Today, Bitcoin miners collectively earn roughly $23 million per year in transaction fees. That is the entire fee budget — not per block, not per day, but per year. Paul Sztorc has done the arithmetic publicly: 2,200 transactions per block, 1,008 blocks per week, 52 weeks, twenty cents per transaction. Twenty-three million dollars.
For comparison, a single mid-sized Lightning custodian processes more annual volume than that. A successful non-mined L2 scaling to a billion users at ten cents per transaction would collect tens of billions in fees — none of it flowing to the hashrate that secures the base layer.
This is the security budget problem, and the conventional answers are bad.
The lazy answers don't work
The first lazy answer is "price will save us." A higher BTC/USD price does increase the dollar value of the block subsidy, but it does nothing for fee revenue measured in BTC. The units cancel. If Bitcoin doubles in price and fee rates stay the same in sats, the security budget is unchanged in real terms.
The second lazy answer is "fees will rise." This is wishful thinking dressed up as analysis. Fees rise when blockspace is scarce, and blockspace becomes scarce only when something is competing for it. If Lightning succeeds at scaling payments off-chain, on-chain fees stay flat. If Lightning fails and users migrate to custodians, on-chain fees fall. There is no path where Bitcoin scales to billions of users and on-chain fees rise to compensate for the subsidy collapse — those are mutually exclusive scenarios under the current architecture.
The third lazy answer is "ASIC efficiency improvements." This is the most confused of the three. Efficiency gains lower miner costs, which is good for individual miners but irrelevant to the aggregate security budget. A more efficient mining industry simply prices marginal miners out faster; total hashrate is determined by total revenue, not by efficiency per joule.
The Sztorc answer: merged mining
The honest answer was published a decade ago and has been stuck in political purgatory ever since. Drivechains, via blind merged mining, let Bitcoin's miners collect fees from sidechain activity without validating sidechain rules.
The mechanism is simple. A miner commits to a sidechain block header in their L1 coinbase transaction. Sidechain users pay sidechain transaction fees in BTC. The miner who includes the commitment captures those fees. The L1 chain remains lean — it never processes the sidechain's transactions — but the hashrate that secures the L1 also secures the sidechain, and the sidechain's economic activity pays the same miners.
This is not a hypothetical. Namecoin pioneered the technique in 2011. RSK has used it on Bitcoin for years. The cryptography works. The economics work. The only thing missing is permission.
Why miners win twice on Ecash
On Ecash, BIP-300 is active from day one. This changes miner economics in two compounding ways.
First, every successful sidechain becomes a fee source. A privacy chain that handles a million transactions per day at fifty cents apiece generates $180 million per year in fees, all of it captured by Ecash miners through BMM. A prediction market sidechain doing $10 billion in annual volume at a 0.1% take rate adds another $10 million. A smart contract chain, a high-frequency micropayments chain, a tokenization chain — each one stacks on top of the others, all paying the same hashrate.
Second, the diversification stabilizes mining revenue. Today, a miner's income depends on one thing: Bitcoin's price. A bear market crushes the entire industry simultaneously. Under Ecash, miners earn from a portfolio of unrelated sidechain economies. A privacy chain might thrive in a regulatory crackdown that depresses speculative trading; a smart contract chain might surge while privacy demand is flat. The aggregate revenue smooths.
This is what professional industries look like. Cloud providers don't bet everything on one customer segment. Refineries don't process one grade of crude. Mature mining industries shouldn't earn revenue from one fee stream.
The 51% concern is backwards
Critics of drivechains worry that miners gain too much power. They could censor sidechain withdrawals, the argument goes, or extract MEV from sidechain activity. Sztorc has addressed this in detail; the short version is that withdrawals on drivechains have a multi-month delay precisely so that any malicious miner behavior can be detected and the network can respond.
But the deeper response is this: miners already have that power. Today, 51% of Bitcoin hashrate could censor any address, reorg recent blocks, or extract MEV from main-chain transactions. They don't, because their economic incentive is aligned with the chain's success. Drivechains extend that incentive to sidechain activity. A miner who sabotages a profitable sidechain is destroying their own future revenue stream.
The alignment is stronger under drivechains, not weaker. The miner is no longer a mercenary collecting subsidy until 2140; they are a stakeholder in every sidechain economy they help secure.
The final 10x requires this
Sztorc's framing of the "final 10x" is the right one. Bitcoin must either reach global money status or revert to zero. There is no stable equilibrium at 1% adoption.
Reaching global money status means eight billion daily users. Eight billion daily users means trillions of annual transactions. Trillions of annual transactions cannot fit on the L1 — that's the entire reason L2s exist. So the question is not whether the activity happens off the main chain, but whether the miners get paid for it.
Under the current architecture, they don't. Lightning routes fees to channel operators and LSPs. Custodians keep the float. Federated chains pay their members. The hashrate that makes the entire system trustworthy collects a rounding error.
Under Ecash, every byte of off-chain activity that benefits from Bitcoin's security pays Bitcoin's security. The miner is the universal beneficiary of the ecosystem's growth, not its victim.
That is what "miners get paid twice" means. Once for the L1 block. Once for every sidechain that finds product-market fit on top of it. The math compounds because the sidechains compound — and the only people who lose are the ones currently extracting value from Bitcoin's brand without paying for its security.