If you had read the last pages and mercatox rules about xrb deposits you would already know if you make such you will loose your coins, soo dont even try, there is two options at the moment, telegram wallet, and download wallet, one has a tiny fee of 5 mrai transaction if im not wrong, soo you dont need to abuse exchange adress.
Mercatox has more issues with their api them really helping mrai community, they have 700k deposited and only 10% looks like had been credited at the exchange.... while this problem keeps its better to use telegram with escrow transactions.