I experienced this a couple of times with different webhosts (in the Netherlands) over the last three to four years. Very recently my monthly bill at one of them went up from around 3,- to around 18,-.
Whenever I read about 'egress costs' I usually laugh about that because I don't even understand it; my data is my data, why pay to get it off your hard drive!? But for some time I'm also seeing dark clouds for my own use cases. I don't find it hard to believe anymore that webhost after webhost is consolidating, trying to play AWS, upping the prices a lot, and finally... also establishing egress costs!??