There is a difference between paying for email subscription and paying to see what you have or have not read yet in the web interface.
I don't use email subscriptions but the has-unread-posts indicator (plus a jump to first unread) is basic forum functionality at this point.
edit: also nested quotes don't seem to work quite yet
Fair enough. I can probably implement it in a way that's cheap enough to run at scale anyway. The suggestion was mainly a way to get people thinking about what would be considered worthwhile paid upgrades, and what is considered basic.
I wasn't singling out that particular feature as one of these upgrades, as a careful reading will show. T'was qualified with it both being possibly one of those features and that it additionally depended on how expensive it is to run compared to other features. The 'advanced features' are part 'how cool is that?!' and part 'how much of a resource drain is it'.
We'll take the feedback in consideration of course, and I certainly don't expect 'unread posts' to be a paid upgrade. What is and what is not depends on if a feature is expected/needed, or if it's nice to have or comparatively intensive.
As for what goes on which list, we welcome suggestions as always. Minus the hyperbole, of course. That's just totally uncalled for and doesn't meaningfully contribute to the discussion.
Edit: I should add that we're working on getting 501(c)(3) non-profit status. With that in mind, I could see us setting up a Patreon goal which means that if the proceeds are enough to cover unlocking every feature for everyone, then that's what we'll do. What target that would be is to be determined.
Additionally, we'll be releasing transparency reports at least twice a year that shows how the Patreon proceeds are used.
I for one would prefer to have paid upgrades, if deemed financially necessary, to be the domain of hosted projects. Any features available to regular members would be the same. That's my
preference. What ChronalDragon, Abner and Miblo think is also to be taken into consideration.
We'll address 'perks' sometime soon in a more thorough blog post, though. :)