Yup, IMO, they are chasing phone numbers and more personal information they can scrape. I can't know for sure, but my thinking not oft used accounts, indicates

Yup, IMO, they are chasing phone numbers and more personal information they can scrape. I can't know for sure, but my thinking not oft used accounts, indicates accounts used for special or minor activities, and as such are the sort of accounts that generally have low numbers of emails -- their removal, very little will be gained if for storage issues, even if some people used the service as a place to back up personal photos and other data. It was nice Google offered free web mails, and for a period of time, but I guess, like always, eventually they figured they wanted more profits. Of course it's a pity to lose such services to the paranoia of 2FA (I'm told it'd take years to crack a 20 char password)... while some services such as google offered email as the second step for verification, in the end, typically the only viable methods reverts to phones and text messages. I have found the second email option doesn't work for google, (not surprised) - I guess their excuse might be, it's sort of anonymous (to marketing types and not to anyone who had access to certain tools) as well.