Although there is no limit on how much you can earn from the 5 % cash back, there are lots of restrictions on how you can apply it towards a vehicle purchase. (allfinancialmatters.com)
The traditional way is to earn frequent flyer miles with a single airline, but that comes with lots of restrictions. (mybanktracker.com)
The range of extended warranty auto insurance includes some extended warranty scams, where lots of restrictions in the fine print make payouts really difficult if a vehicle breaks down. (autos.com)