I logged into Amazon Smile (0.5% of what I pay goes to my favourite small charity but this may be on offer on Amazon). You may or may not get this offer but worth checking for it:
Stream a full track in Amazon Music Free for the first time and receive a £5 coupon.
Promotion ends April 15th 2021
Your reward will be emailed to you within 1 week of your first stream and can be redeemed within 30 days of receipt against an eligible purchase of £20 or more.
See terms and conditions at the bottom of the page