I closed the Gumroad shop because they recently changed their payment method and the handling fee became higher.
I only sell one or two packs a month (even less), so I can't afford the current fee.
If anyone wants to download past art packs, you can find it on Patreon.
Since there's no art pack shop anymore. I decided to release the past art packs at the lower price. Now it goes to the $10 ter (including full-res and layered files).
The $20 tier content will be the same as the $10 tier and will exist until no one pledges to it.