New rule to prevent spam

I feel like thats made up, because if vetex really did read a suggestion, then he would lock the suggestion then add [REJECTED] or [ACCEPTED] next to the post name

yes, those arent allowed in general discussion, make sure to flag them.

what if someone comes up with an idea and wants to discuss it with people? for example nerfing a shields or changing how something in some specific magic works? does that count theoretically as a suggestion that should be flagged?

No, a discussion about it is not the same thing as a suggestion. Talking about the near future of the game or potential future updates is okay. But if you’re making the post for the specific reason of suggesting changes or features then it would not be allowed.

oh okay cool