Although SiteGround sent out emails weeks ago about server migration, there was no notice to users that all their account data was being transferred on to G servers. Now G has a full archive of all the data, including emails that were hosted through SG

Their blog post today about it (posting AFTER the transfer)

https://www.siteground.com/blog/moving-to-google-cloud/

Many people chose SiteGround because they didn't want to host with a Big Data company. Now they have no choice