RPG Maker Forums

I appreciate this may not be the best forum for this subject. Being new to RPG Maker, I naturally put in in the MV forum, but please move, if appropriate.

Two questions:

(1) Even with the dlc, there are instructions to credit certain individuals for their work. That's fine, I completely agree with it. I have even started making notes of the names of the people who have contributed to the files in my project. But I can see that by the time I get to the completed game, I may not know exactly who was responsible for every single asset used in the final game. Is it acceptable simply to credit everyone whose assets have been included in my project (but not necessarily in the final game), or is the correct ettiquette to keep complete track of exactly what credit needs to be given to every asset in the game and credit only those responsible for the assets? Obviously if I go with the former route, I may end up crediting people whose assets aren't actually in the final game, although nobody who did contribute assets would be left out.

(2) If I take an asset from, say, the rpg maker forum, do I need to keep checking whether the terms of use remain the same? I suppose what I'm asking is whether it's legitimate for a poster to subsequently revoke their terms of use after an initial post.

Thanks for any guidance you can give, and apologies if this is in the wrong place (or asking questions which have already been answered many times before!)

Osito