Many people never get out of the habit of buying something that's on sale or redeeming something free. They're stuck in the mindset of back when we only had a handful of games and they cost a lot of pocket money, rather than realising all games end up cheap and go on sale constantly so you're not missing a deal.
Nowadays you just have to buy the very best. We don't have the time to play and watch every single game, film or TV series that seemed interesting or worth a try.