Promotions and bonuses will not be superfluous, you can also come up with some kind of affiliate program.
Do you mean creating a referral program with rewards?
Why not? I noticed that many modern exchanges have an active affiliate program, this is a good marketing move.
Thus it turns out good advertising. More famous exchanges take a partner less known and all are satisfied.
this project needs a huge advertising, the project is very good, but little known, the more ways of advertising, the more users, this project is able to conquer the top 10