Normally Hilton Honors is the least rewarding chain loyalty program for spending at their properties. But their promotions can make up for that. Fairly standard is double points, which you can think of as an extra 4% return on spend. That makes them highly competitive, without factoring whatever promotions those other chains might be running.
For September 7 through December 31, 2021 they’re running PowerUp which is double points for all members on all stays, and triple points for co-brand credit card members. (Registration required.)
This is a nice, simple promotion without excluding properties or limiting bonus points – the more you spend, the more you earn. It’s nice that in recent years Hilton has solved the problem of excluding hotels from promotions (presumably by funding them centrally, rather than soliciting participation).
You should register for the promotion even if you don’t expect to have Hilton stays. That’s because if you don’t do it now, you won’t remember to do it. And you could wind up unexpectedly at a Hilton, even for an airport overnight when your flight delays or cancels. And this bonus is earned with the first stay, rather than only starting off on a second stay, so you’ll earn right away even with just one.