1. Has no item economy, just overpriced skins.
2. Literally has a server mod/plugin that exists within CS:GO (Most won't acknowledge it is, but it has abilities, passives, ultimates, etc...)
3. An efficient way to troll and grief player's time.
Other than that it is a decent CS:GO clone and I guess for most normies, an Overwatch mix, I personally don't see it lasting long. The only reason it would is probably because:
1. It's Riot Games.
2. Marketing was... not that bad and hype was extremely built up and peaked... in the pre-release beta.
3. The game is free to play. That model in itself exists for a reason.