Ah, thank you! It looks like Agenda[0] does use that model. Here's a blog post with details[1] in which they mention that Sketch[2] also uses the same business model (with some minor variations).
tl;dr: you buy the app and 1 year of updates. You keep what you pay for.
I wonder if it would be viable for an app like photoshop to have a feature marketplace. You start with a very basic version of the app and you buy the features you want piecemeal. You then have a separate service contract for ongoing support (ie: bug fixes).
Oracle is famous for this, and it basically amounts to anything you want to do leads you to another sales rep with an upsell -- everything useful becomes feature-gated.
It might work better with consumers, where such a strategy isn't cost-effective, but I also imagine its a difficult system to tech support -- you get a combinatorial explosion of possible "features" that may be in play. Anyways, it incentivizes bad behavior even consumer side, encouraging results like 200 $1 features and communities/tutorials/discussion becomes strangled
tl;dr: you buy the app and 1 year of updates. You keep what you pay for.
I wonder if it would be viable for an app like photoshop to have a feature marketplace. You start with a very basic version of the app and you buy the features you want piecemeal. You then have a separate service contract for ongoing support (ie: bug fixes).
[0]: https://agenda.com/ [1]: https://medium.com/@drewmccormack/a-cash-cow-is-on-the-agend... [2]: https://www.sketch.com/