I only play pvp 6v6 and the only thing you can buy with paid currency is cosmetics. There's also a pretty robust in-game economy. One of my friends (actual unironic jew) started with crates you can buy with free currency and flipped shit on the marketplace until he made $200 USD in-game currency without spending a dime.

In that sense it reminds me of TF2, which I like, because I used to be a huge TF2 autist. I just wish there weren't bots, I love big fat robots. Pic is my 2 highest playtime games on steam.