Touch layouts put the buy button uncomfortably close to the spin control on several games, and a stray tap can cost a hundred times your stake instantly. Some studios add a confirmation dialog, others do not bother, and there is no consistency across the market. Games that include a confirmation step before charging are noted on https://thebonusbuyslots.com, which is more relevant on phones than desktop. I keep the buy menu closed unless I am deliberately using it.