What does "Billed via Shopify" mean?

If your Deskhero subscription is paid through Shopify (typical when you installed Deskhero from the Shopify App Store), your plan shows "Billed via Shopify" and, in Deskhero's words, "billing is handled through Shopify at the end of each 30-day usage period". Plan changes are approved through Shopify rather than by entering a card in Deskhero.