I am bootstraping, and have used proton for years as my only email, but have my own email now, and am slowly backing out of proton. The horrible way that they extort by limiting and degrading a service is only part of the problem.They degraded email replies at one point, to a tiny "page" with less than one full line of text. There is more, but proton is not worth the effort to remember and detail all of it.

I will use google or any other service for building up an advertising presence. And keep the proton, until everything is moved. And then again, pragmatism might decide in favor of useing the proton service, but only as the core of my business is seperate,and will spread my add bucks around, so I feel safe. Currently have NO guggle anything, because of past denial of service, and will only use them for the advertising side as well.