I feel obligated to chime in here a bit. I was the Alacritty member who was contacted and who offered some feedback.

I have absolutely no hard feelings.

Would it have been a good idea to charge them for my time, IDK. I was in between a research role and a new job at the time and more than happy to help. Do I feel like I missed out on something, maybe a little bit, but that's more on me than them. I'm sure if I had angled for a position working for or with them, they would have considered it seriously.

Would it be nice to have more support for Alacritty, perhaps. But there are a lot of conflicting opinions on what to work on and what features are good for the project, so it's not as simple as just adding money and people. I was always hoping alacritty could be a minimal library others could use, and I'm glad it has turned out that way.