Replying to an earlier post

This is happening on the mobile version of Edge where users are being offered a referral scheme. If you can get a friend to switch to Edge via a referral link, you’ll receive 500 Microsoft Rewards points (with the ability to accumulate up to 7,500 points per month if you’re feeling ambitious).

You can redeem a $5 gift card for Microsoft for 5,500 points, or a $5 gift card for Amazon for 6,500 points.

So basically they’re giving you $0.39 - $0.45 per referral with a maximum of $5.77 - $6.81 per month.