I maintained an adversarial browser extension with around 100k users that added stuff like tooltips and keyboard shortcuts to a browser game, for about 3 years.

I maintained an adversarial browser extension with around 100k users that added stuff like tooltips and keyboard shortcuts to a browser game, for about 3 years. The reward was the developer copying a couple of my easiest ideas, then sending me legal threats and banning a bunch of my users (who were their paying customers). The engineering time they spent (quite a bit) trying to detect my extension or break it could have been spent doing things like adding ARIA roles and alt text, but they don't care about people with disabilities. I kept it going for 3 years because I cared about the people who used it, and the developer struggled to block it because it's hard to outwit someone who worked on web browsers. In the end though, it's not worth doing free work for a company that doesn't respect the needs of their customers. Go elsewhere.