Is it relevant to make suggestions? That’s my question.

Some do. Memechat was created after a bunch of people were requesting a private chat feature. The ability for stream owners to add their stream rules to the submissions guidelines was another feature people here requested.

I started an update log last year, which you can view at https://imgflip.com/i/4k9rd2

Many of the updates there can be found as suggestions in this stream

Also, a few years back I suggested the follow button with another account (MemeGuy_609, now deleted) and it's there now