I don't know if there's a thread for Hilton cards in general (I know there is a Surpass one, but I vaguely remember there wasn't an Aspire one ..., and there doesn't seem to be anything in the Amex forum which mostly focuses on MR)

Anyway there are some good SUB for the Hilton cards now until April 15th
Hilton Honors Amex Card: 70,000 points + free night award
Hilton Honors Surpass Card: 130,000 points + free night award
Hilton Honors Business Card: 175,000 points + free night award
Hilton Honors Aspire Card: 175,000 points

I already have 1x Aspire and 2x free card, thinking of picking up more for P2 and going all in on certs before they get nerfed more.
The free card and the Surpass are good pickups here for the certs, you can upgrade to the Aspire card and also get a cert then (theoretically this is a one time only deal). Wouldn't bother with the Business as there isn't anything to downgrade it to. But who knows if certs will still be good in a year anyway
I drained all my HH points to stay at WA Maldives but the Hilton FNCs are probably the last good thing left after the Hilton devaluation and upcoming Hyatt devaluation.
Still working on stacking 85k Marriott certs (have Brilliant and Ritz and will hopefully get a second Boundless soon) but they are less useful as they can only go up to 100k