Prior to Fortnite, I know in-game purchases were a thing but since Fortnite, it seems like loads of games use the same system and often trick people (mostly kids and young adults) into spending money on otherwise useless stuff. They started the trend of arena-style gaming as well which makes it even easier for devs to milk gamers of their money.
Well if you're naming Fortnite , then don't rule out FIFA and PUBG for implementing multiple paid in-game options. Royal Pass in PUBG , and player packs in FIFA.
Fortnite isn't the only culprit when it comes to microtransactions in games. Many other companies have implemented in-game purchases for their consumers. I'm afraid I have to disagree with the idea - I believe gamers are mislead into purchasing a completed game...
All the major game studio are focusing on microtransactions , so u can't only blame fortnite here