Or, maybe that is a price Qatar demanded to go along with Trump’s “peace deal” for Gaza.
Qatar (and perhaps Trump, too) is still butt hurt over the Israeli air attack in their only city. Not like they didn’t earn it by all their support of Hamas.
Still, their air base is very useful, and almost crucial for US air superiority in the region.
This pledge is probably not worth the paper it’s written on, other than to serve as a warning to Iran and it’s proxies.