Most big lenders keep $1.5 to $4 a year from every $1,000 deposited. Aave holds $29.7B and kept $5.2M in 30 days, about $2 per $1,000. Maple and Dolomite keep twice that, around $4.

Morpho is the second biggest lender with $16.9B. Its borrowers paid $27.7M in 30 days and the protocol kept $0: its fee switch is still off.

SparkLend shows only $1 per $1,000, but most of its stablecoin deposits come from Spark itself, so that interest goes back to Spark and Sky anyway.

Aave holds 38% of the top 15's deposits and takes about half of their revenue.