Not a bad idea, at least for the beginning. I never heard IFTTT before. Just checked it. May work. So the idea could be:

• There is a bot that randomly texts a message in a Signal Group that one or all users shall send a picture now.
• The group may have autodeletion of the pictures (after 24 hours).

Limitation:

• No "Double Picture (at same time)"
• There is no measurement by software if a picture is too late
• There is propably no direct notification only to specific users.
• There is no gaming thing where you get credits, when you are on time.

Yeah i get your point. But if people want to take pictures of their live (with foreigners without asking them), then they can also do it now. But most of them are not doing it.

A few friends of mine have BeReal. and from time to time i watched reals of other people (who i also know personally). What i like is that you get a good impression what they are doing even though you do not see them often.

But yeah sometimes there might be people on it you did not agree to publish this foto.

On a centralized platform (with open source technology) there is probably less guarantee that the pictures are really deleted (after a few days) but maybe you should trust the sw developer/hoster.

Oh i didn't know that. RHEL 9 also uses it as defalut. Propably some forks of it aswell. Rocky, Alma?

Oh i mixed it up with ZFS. I think ZFS uses no one by default.

So you know what real people are doing and what fake people are doing.