The surge of fanart was interesting, to say the least. Though what caught my eyes is this one twitter degen named Regisvine who decided to jump in the ship by editing the
existing Pekomama's asset with some scantily-clad waifu from boat gacha game (Somewhat NSFW link ahead) and call it a day. Everyone was like "yoooo that was some good shit me so horni"
Being a degen with photoshop skills to put vtuber head into some naked waifu body and thinking he's an artists (hah), he 'forgot' to credit the assets he used and one of them artist from the boat gacha game reminded him of the fact.
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As for other holomoms, I can imagine the artists deciding to focus on other known holomoms first (Nerissa's mom, Matsuri's mom, etc) before going to others. But right now, pkrmm is the new hottest thing in the block, and it would be some time before the initial horny wave passes over and everyone got their post-nut clarity.