The exact amount of fees generated by protocols built on Tezos depends on a variety of factors, including usage, the number of transactions, and the size of the blocks. For example, Kolibri DAO is worth over a million dollars and has seen blocks with more than 1,000 Tez, indicating that the fees generated by protocols built on Tezos can be quite substantial. However, the exact amount of fees generated by protocols built on Tezos will vary depending on usage and other factors, so it is difficult to give an exact figure.