I've been using Opera and Firefox. I clear all data at the end of every session. All adbock, script stop, and popup blocks are off...
also, it is important to accept cookies (3rd party too) as that is a tracker for the offer.

The ones on Facebook I almost never have issues with, they work ninety five percent of the time. The ones for Tokens from main site, that i still am having issues with too, only working maybe sixty percent lately.