5 star deserved!
I tried using promoco heepsy and marbosft and all of them were just terrible. Constant shadowbans and account blocking, stone-age hashtags and geo settings, and price for services was completely unjust.
Meanwhile, Zen-promo tries to provide good services for a small price. And it's the only one from the similar services which don't look like it's in the state of despair and decline.