IMHO, the current active licensing model fits Cloudron better. A smaller plan with five or ten apps would be great for enthusiasts like me while a one-time purchase would just open the door for some businesses to pay once instead of subscribing — and then forget about the product entirely. If anything happens to their Cloudrons, they can just browse the forum for free help.
And I’m saying this knowing that, where I live, one year of subscription costs around one third of an average monthly salary