Couldn't find this on the thread, but I got an offer today for 8 miles per dollar spent on my United card. Does anyone know if I can just spend $1,500 on Travel Bank and use that for flights later?

Thank you!

Your offer is activated.

Reminder:

From 5/15/21 to 8/15/21, you'll earn 8 total miles on United purchases and 5 total miles for every $1 you spend on other travel purchases and at gas stations on up to $1,500 in total combined purchases with your United MileagePlus® Credit Card.*