Ahhh. Upon further investigation, it seems we may have a swing and a miss here (or a partial miss? I don't know...)
It seems the superior term is рейкбек (Yandex 1798 ), which is already registered (recently too. June of this year).
I own Рейкбэк (Yandex 261).
Mine has more content results on G (57K - 41K), but gimme the search volume
Can anyone (preferably a native or fluent speaker) articulate the difference between the two, other than what's visually obvious? Is this an alternate spelling of the same thing, two totally different things, a different tense, etc?