I use Rakuten for cashback with the app or browser I’ve only joined a month ago and earned 65 already just through my normal shopping and one welcome bonus and referral bonus.
use my link to join and spend £50 in the first
90 days earn your £25 bonus
Amazon is not included in the welcome bonus but does gain cash back
https://www.rakuten.co.uk/r/KAYLEI4672?eeid=44971