Yeah I’d expect at least 1 download per 10 visitors at ReferBack, though bear in mind their downloads are “attempted downloads” so some are dupes that failed.
A failed download will still show as a download.
The problem with Referback, is you must either register an account or enter your account details before the download starts. That probably runs a lot of people off.
And then they try forcing a download of their Belle Rock Buddy before the download starts. Why don’t they do like Fortune and ask whether or not you want it?