Sites that require phone number verification often block numbers allocated for VoIP services for fear of spammers. YMMV if you've tethered your GV number to a physical device at some point.
I've run into this semi-frequently over the years, and it's always extremely frustrating when it happens, but somehow I can't remember exactly where either.
I can back this claim up. I was unable to verify my Citi credit card over the phone using my Google Voice number, they insisted on a non-VoIP number which ultimately delayed the verification process by a week.
I've run into this semi-frequently over the years, and it's always extremely frustrating when it happens, but somehow I can't remember exactly where either.
Old references online point to Facebook, Line, and Snapchat: https://www.reddit.com/r/Googlevoice/comments/3uv3mt/google_...