I think your first point totally valid and justified, though the second is a little more nuanced, including Proton Mail making promotional mileage out of some genuine privacy and potentially security related concerns.

Being Australian this is likely one to report to the ACCC, as Aussies at least have basic consumer protection, though that get murky with overseas tech entities.

Much appreciated!

Excuse my ignorance, but how are these added to Ublock, as it seems such a sensible thing to do?