curl -fsSL https://repo.aosc.io/pubkeys/repo/oma.gpg | sudo gpg --dearmor -o /usr/share/keyrings/oma.gpg
echo "deb [signed-by=/usr/share/keyrings/oma.gpg] https://repo.aosc.io/oma $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/oma.list > /dev/null
sudo apt update && sudo apt install -y oma
Thankfully, the article did clear that up, but the fact that my brain didn't even think, "that's a stupid idea that no one would buy that" is a bit depressing.