Consider for example the domain name bonusdeals.com – one of our best. Very naturalistic phrase. People say “bonus deals” all the time. (Versus for example some more stilted expressions, that center around the word deals.)
We believe that for some companies, such as startups, going with some kind of catchy non-naturalistic phrase might work well, but if you can afford it, go with what says what it means – bonus deals, which is a very nice expression that one might use in real life.