@briankrebs It is the reason I currently don't share phone number with most people. I know it would be send to crappy apps most phones have. LinkedIn, only corporate service I use, tries to get my number. Every time I log in (I don't often do it anyway) I see these annoying popup windows. They have also something to "import contacts" from e-mail address, luckily it couldn't scrap anything from Protonmail, even if I accidentally click this or if they would decide to do it automatic way.