It's not about the money, it's about the fact that I would depend on vendor-locked functionality. I cannot maintain my own fork of it if for whatever reason I had to. I don't want to fork datastar if I don't have to, but I want to be able to do so if I have to.
Alpine does have a "pro" version as well, but it's just copy&paste code examples. I am not complaining about Alpine, and I even got my employer to pay the maintainer more than what the datastart guys are charging for their pro version. So again, this is not about money.