Any reason the dev of the Summit app is banned?

A good question. It must have been because he spammed some pics in !cat@lemmy.world. Lemmy has a mod log, but I can't filter mod actions within a certain time frame, in this case 2023. As there is no such functionality, I would need to scroll the log long enough to get to 2023. Therefore I can't say whether it's me who banned the user.