Burns can have a positive impact on crypto tokens by potentially reducing the token's supply, which might increase its scarcity and value in the market. However, the effect depends on various factors and the overall dynamics of the specific token's ecosystem.
Burns doesn't need to supply a successful project they keep their development process moving and attract investors. If the total amount of tokens of a project is high then i think the burns system will not work. Moreover token reduction of good projects is effectively positive.
Also, many project gona to scam like this system, so that's why you have to be careful and stay away from such project.