Yes, an easy call to pay taxes on Jan 1st thereby generating almost 2 yrs of Mosaic. I used the cc to pay 2018 Q4 941 business taxes from our 12/31 payroll. And fees generated by paying business taxes w/ a cc are deductible, still.
Mosaic saves me oodles on flights. My god, it's such a powerful program. I'm CP on SWA too and together it makes booking trips fun.
I'll leave it to the talking heads on BA to strategize about getting those up crappy up front seats on domestic legacy airlines, yawn. But then I'm the kind of person who can't help but laugh when I read about those poor saps schlepping to the Maldives just so they can max out their free hotel awards. To each their own, I guess.