You are right, stillcrazyman, we do - and I do. However:
I think it makes more sense for ProCamera to rip out and charge for some of its more value-added base features such as the iCloud-integrated photo albums, album selector, 3D Tiltmeter, gray card calibration, rather than charge extra for things (long exposures, HDR, etc.) that are included with every other of the multitudes of camera apps.
But that's ProCamera's decision to make, and it's my freedom to choose. I've been perfectly happy for years with Apple stock camera app (which has become pretty powerful) and the fantastic Camera+ app in the past - chances are I'll vote my dollars for Camera+ 2 once an update comes to fully support the iPhone 11 series.