Hi Thomas,
Revenue is the total streaming fee on the products, there is then a deduction for the methodologist portion of the fee split. Gas costs are not taken into account since they are not currently incurred by Index Coop. In line with the recent Snapshot vote.
In the future, we are also hoping to track on a more granular level contributor spend per product to more accurately reflect maintenance costs on our products, and should gas costs move to the DAO in the future we will then take that into account when calculating gross profit.
Hopefully this clears up your question 