Also the offers could have an expiration date set by the user. The default could be 14days or something and it could be set to "never". This could help to semi-automatically clean-up the "feed", because relying on people to delete their offers is not that reliable. Esp when they use the app once and never return back.

Expired offers could stay in the system for a while, but you'd have to go to expired offers to see them. And the owners of the offers could renew them if they want.

Anyways, just some ideas, vexl is perfectly fine as is 👍.