I pay for:
Deliveries - $4.99/year
Overcast - $9.99/year (subscribed once because I needed the File Uploads feature, never use it anymore but let the subscription continue because I like the app)
Tweetbot 6 - $5.99/year
Halide - $9.99/year
I recently tried “Glass”, which is like “Fancy Instagram”, and it was nice, but $4.99/month or $29.99/year is too expensive for what it offered as is, plus a social network is only as interesting as who I’m using it with. As far as Instagram has gone downhill from where it started, it’s still where my friends and family are. No one I care about is going to pay for a fancy instagram.
I use 1Blocker, but it’s not a subscription. I was apparently grandfathered into some features, though there are still some I don’t have w/o the subscription. I haven’t looked at it recently, but apparently I can just get a lifetime subscription to 1Blocker Premium for $12.99, which I might go ahead and do, or if not $4.99/year is more than reasonable.
I use Fantastical without the subscription too. Their subscription pricing seemed insane to me, but if there’s a market for it, more power to them. The free functionality isn’t much different from the built in iOS calendar app, but the visual style of Fantastical is slightly more appealing to me, and now I’m just accustomed to using it more than the built in app.