Yeah, it’s probably more complex than my post made it sound
I was thinking that the premium add-ons would be a one time purchase, but restricted to the number of simultaneous installs, similar to how premium Wordpress plugins are licensed to a single domain.
So the price for each plugin could vary, depending on its complexity and development time, I was thinking something like €20 - €50 per plugin, and with the option of purchasing it for a different number of ‘activations’.
Say a simpler add-on was €20, one-time purchase, but could only be active on 1 setup at a time, and then there are pricing tiers for those that require multiple simultaneous installs such as up to 2-5, 5-15, 15-30, 30+, with discounts applied to the larger tiers.
I think as long as the pricing tiers were fairly priced, even just an additional €1 for each additional device, and there could be an option of ‘upgrading’ by purchasing additional activations if needed.
I think would be the fairest option, as opposed to an increase in monthly costs, which would get costly for users with lots of active devices who already pay more for the increased use of the service and which ultimately would have to be passed onto the end customer.
It also means that those users who need, say 50 activations, pay more, but just pay once.
I guess from info-beamers point of view, selling even a simple add-on for €20 could seem like a lot of work for very little return, but if these premium add-ons were developed when the requests had reached a minimum number of votes, then at least it would be more likely that customers would actually want/purchase them once available.
I’ve seen other examples of similar systems, where the users vote for new features, and I think most users would be happy to pay a small cost if it added the feature they really needed.
I don’t have a clue as to your user base and so don’t know how many users would participate in voting for new features.
Obviously, this wouldn’t interfere with the development of ‘one-off’ features/packages for private usage for customers.