> I have long wondered about the market size for privacy-focused apps.
The real problem is how to trust that a "privacy-focused" app is actually privacy-focused. You certainly can't take the publisher's word for it.
The only safe stance is to withhold as much personal information from as much software and services as possible.
If a company wanted to, they absolutely could include something along the lines of "If we violate the terms of this privacy policy, we owe all affected users $1000" in their Terms of Service. Pointing a gun at their own head to prove that they're serious. Companies don't do this, because they are cowards.
> The real problem is how to trust that a "privacy-focused" app is actually privacy-focused
I think the real problem is actually that legislative bodies will make privacy focused apps illegal. California AB 1043 is an example of what can happen.
Even if they were initially trustworthy, it's surely only a matter of time before they start wanting/needing to make (more) money and start abandoning their principles in pursuit of profit.