So you’re right that the Barclays AA Aviator Biz is an option. The SUB is currently “up to” 60k AA, broken down as 50k AA when you spend $1k MSR In 90 days and another 10k AA after a single purchase on an employee card. Activating the employee card can be tricky. There’s a $95 AF that’s not waived. This SUB is down from a higher offer of up to 75k AA earlier this summer.
The catch with the Aviator Biz (and other Barclays co-branded biz cards) is Barclays has frozen a few DISchurners’ cards after approval, with their cards in hand, and requested documentation about their business (incorporation docs, business licenses, EINs, tax returns, etc.). There’s doesn’t seem to be any rhyme or reason for this and it’s highly YMMV. Most folks who applied for a Barclays biz card over the summer (JetBlue, AA, Hawaiian) met their MSR and got their SUB without any problems, but a few got hit with these card freezes and requests for documentation. If this happens, it’s unlikely you’ll pass review if you only have a “business” and you’ll end up just asking them to close the card and refund your AF.
However, since this is a biz card, the damage is minimal. It will never have showed up on your personal credit report, your credit report will show only a hard inquiry as the only sign you went for this card, and you’ll have wasted <$1k in spend on the MSR. The upside of taking a risk on this card is another 60k AA (although not as good as the 75k AA offer earlier this summer).
As for the GrAAvy train, the new batch of mailers now include time restrictive language for the SUB, but I think DPs are still developing whether this will have any effect (whether the language will be enforced automatically). You could risk applying via a public link, which includes the time restrictive language, but it’s still YMMV that you might get the SUB despite the restriction. You need to read @SouthFayetteFan’s writeups on the state of the GrAAvy train to understand these changes and evaluate your risks.