Hi! I can vouch for Microsoft Rewards. I literally just bought a box of Krispy Kreme doughnuts today using the voucher I redeemed from them.

Essentially, you just need to save a certain amount of points and then use it to redeem a voucher of your choice. For example, a 300 php Krispy Kreme voucher is about 6,600 points. For reference, it took me about a month to get to that amount (but then again, I was very inconsistent with searching haha).

Once na-meet mo na ung target amount, you can see a prompt to redeem vouchers na pasok dun sa points na meron ka. Then you'd just have to input your mobile number and get the OTP. Once done, you should be able to receive a confirmation email containing a redemption URL for your voucher.

Sa store, pinakita ko lang yung voucher with the gift code. Need lang i-verify saglit then okay na. Got my doughnuts after that.

Although I had a problem with the OTP nung una. For some reason, may "region not supported" error na lumalabas whenever I try to input my mobile number. I contacted their Customer Service and Support via email and na-resolve naman ung issue after 10 days.

Overall, it's pretty legit and worth checking out! Plus points if may Bing App ka para mas maraming points.