I hadn't played at Caesars properties in 5 months and was less than 30 days away from $150 in reward credits expiring. I didn't feel like going there and running $20 thru on video poker or whatever it takes to reset the 6 month timer.
I discovered
https://www.sayandplay.com/
sign up and take the 1st survey and they give you 500 reward credits($5) on total rewards the next day. The best part is that it reset my timer to 6 months again!
It is quite a few questions for your profile and then 15-20 minute survey, but if you can't make it to a casino, or don't want to then its a great option.