bing. com/explore/rewards
If you search on Bing, you can get credits to buy stuff like gift cards. Last time I checked, you're limited to 5 accounts per household, idk if they still have that rule.
I redeemed a few hundred dollars worth of Amazon gift cards thanks to Bing Rewards a while back, when my friend made a private, working Bing bot that automatically searched on Bing for you on 5 accounts. I'm sure there are working bots out there right now, but most of the public ones have been shut down.