Assuming your time is worth minimum wage - you haven't even broken even yet. This is a very, very long term play. You have to bank on YouTube still being a do

Assuming your time is worth minimum wage - you haven't even broken even yet. This is a very, very long term play. You have to bank on YouTube still being a dominate market, not getting too greedy with it's algorithms or revenue sharing, and your old videos continuing to attract a large number of views. If any one of those goes wrong - you're basically working for below minimum wage.