CO OnePass is the only one of the Big Six programs I would classify as probably fraudulent in a strict legal sense. It "advertises" awards that do not in practice exist (standard Y to Europe in summer, etc.) and, like Continental itself, treats non-elites as irritating cargo. OnePass is absolutely the worst FF program in the US.

Yes, people get standard awards from OP now and then. People hit the progressive jackpots at Caesar's, too, but I wouldn't make pursuing them the backbone of my investment plan.