Card linked program Dosh has been popular, especially for offers such as Sam’s Club (4-5% back). Previously when these offers were active you were limited to earning $10-$15 per day, but jnjustice & IChurnToBurn note the following new language (emphasis ours):
In-store cash back offer valid at participating locations only. $15 max lifetime cashback per Dosh user.
It seems like this will actually be enforced as people who have earned more than $15 aren’t even being shown the Sam’s Club offer any longer.