"This card would be your best option for non-category spend (apart from the Discover it Miles, that offers 3% cash back for the first year). Obviously this is a loss leader for USAA, but they would be trying to make that money back on the checking account that requires the $1,000 direct deposit. Most other financial institutions have used bank account bonuses instead, but Fidelity also loses money on their 2% card but still come out ahead as cardholders have larger Fidelity deposits than non-cardholders. I suspect USAA will need to add some limits to this card to make it sustainable, but the limited membership might make this unnecessary."
Doctor of Credit is the only worthwhile credit card/bank account/money saving blog to follow. The rest of them collect commission from referrals and it shows from their content, for example advertising a small sign up bonus for the AMEX Platinum when there was a much larger bonus available and pimping Chase cards hard. The doctor has a strict no referral policy to stay neutral and provide the best content.
The Limitless card is pretty much a market test at this point and not an established product.
USAA is currently market testing a 2.5% CB card in some states - http://www.doctorofcredit.com/usaa-limitless-credit-card-rev...
Personal, non-business card, military and family only.