I actually had a first time redemption for Hilton a few weeks back. It showed up as complete on e-Rewards' end and was in my Hilton account within about 48 hours.

Last I looked, you can redeem for Accor and IHG pretty much infinitely (a few years back, the IHG points were even elite-qualifying), possibly Choice too. The airline are typically once every 30 days. I've done 7 different redemptions in the past 30 days- 5 different airlines and 2 hotel programs. Hurrah for the 10 surveys a day spigot and a spouse who likes to watch tv at night I find to be boring.