TIC-80 is heavily inspired by PICO-8. Supporting PICO-8 enables the creator of the original technology to continue producing creative works that seem to inspire a lot of derivative projects. Whatever the case, if you don’t agree, then don’t buy it. It’s pretty simple in that regard.
I think you missed the point, I perceived the question (which I'm asking myself too) how do these differ? What makes one more fun or better than the other?
I use both pico-8 and tic-80. I like both of them, but I like pico-8 better. Why? Aesthetics pretty much - and isn’t that enough? These aren’t tools to get things done; they are more like songs you listen to.
