Yeah, I also was under the impression that they would be rare and we wouldn't have to grind for them so often if we wanted them. Seems like Riot wants to burn out the whales who buy and collect a shit load of skins, which is hilarious because people who just like the game have been burned out for a while. This is honestly a bit ridiculous.
Like, one prestige skin a year? Sufficiently rare and cool to get. Two? Pretty rare, you'll just have to play a lot. Three? Alright now they're losing their novelty and becoming a bit fucky. If they do one every other patch like this no one will give a shit there are prestige skins. They should stop trying to rip off Fortnite's battle pass system that has an ultra rare skin at the end because what they don't seem to realize is Fortnite has literally 100 (I believe I don't play the game) tiers of skins, emotes, pickaxe thingies, parachutes, etc, and Riot is literally asking the same price and a similar grind for one fucking skin which is rare but no longer novel. Wowee.