Dating apps also suck at giving compelling reasons to pay them unless the app is purposefully made worse so they can sell the functionality back.
We have 10+ years of Google, Facebook, and others handing out major tools and functionality for free because of the privacy invasion.
I have to wonder how things would have looked had that not become the norm.
As far as being purposefully made worse, yeah both apps do that. Grindr charges $100, Scruff charges $120 a year. Considering how popular both apps are I have to assume they are pulling in quite a bit of money.
At least in the US, one might imagine this is more important to users than hiding their sexual preference.
I'm not sure I agree, though. In an open relationship it'd be no surprise to my partner if I were using Grindr (he probably would be too, in that case!) and I think therefore that'd be more or less orthogonal to the concern around the risk of forcible outing posed by Grindr's misuse of data. Both are certainly of concern, but I think independently so.
But this is a conscious choice. A small team should not need to make the decision to do something like this.
Also Grindr or Scruff isn't exactly small and have a fairly devoted base that doesn't end just because they get into a relationship.