Hey everyone! Where do stickers go? And do items in the Quest Point Shop retire?

No, items in the quest shops stay around permanently. The only ones that semi-retire are the ones in the seasonal tab, but even those come back every year during their relevant season, so if you miss out on them you can grab them when they come back.

Stickers go in your sticker album if you use the self-sticking service provided by the Hustler (here), or they go into someone else's sticker album if you stick them to another user.

Thank you :)!