Honestly it's a gimmick to cloud the real price and provides little to nothing to the project itself. If projects are promoting it instead of what they are actually doing than it should be a red flag for anyone. It's a smoke and mirrors game, stops people from asking what they are really doing with the project.
The rug will come when everyone believes in what is called Burn Token. Even though that doesn't guarantee that the token can be trusted. Many scammers engage in this kind of practice in anticipation of new users asking how the project is progressing. Don't believe in new tokens that don't have a strong community, let alone promotions that you can't rely on. it's better to choose a token that is old and currently bearish, that's better.
despite the fact that those scammers are generally using this burning of token for somekind of marketing stunt, its good thing to know that majority didn't really fall into this trickery.
even though there are many shitcoins that created some kind of burning event but majority just don't care, they don't give a damn in regard of the coin thats trying reducing their supply through the means of burning.
instead, these coins are slowly heading towards their certain delisting in the future.
its just how it is with crypto space nowadays, even burning token thats supposed to be used for retaining the value is used for marketing stunt.