Regulators in the UK removed the buy button back in 2019, so anyone playing on a licensed British site simply will not see it. Other markets like Ontario and parts of Europe have similar restrictions, and the rules change from time to time. A country by country overview of where the feature is currently allowed is maintained at https://thebonusbuyslots.com (https://thebonusbuyslots.com), and it saves a lot of confused searching. Keep in mind the same game can look completely different depending on which license the operator holds.