Most serious exclusive makers are locked behind a small Patreon subscription ($3–$5/month). Creators like GD Colons or TheNexusGD release monthly "Icon Packs" that include .plist files and custom spritesheets. Paying for this access is what makes it "exclusive."
View and experiment with icons locked behind grueling achievements, like those requiring 10,000 stars or 500 demons. Custom Texture Packs: geometry dash icons maker exclusive
And yet.