Yeah, you get them with Premium I think. I never bought it, but someone one gave me an award that came with 700 coins and a month of premium. It was interesting going into the Premium only subs, but nothing special enough spend money on in my eyes. I still have the 700 coins, at least for now, since I didn't see the point in spending them before all this and I don't see the point of going back.
If you want to score some Lemcoins to use on here just let me know. I'll send you a bitcoin link that will allow you to buy them while they are still cheap and Lemmy is on the ground level.