I contacted Google+ via PM pointing to this discussion and since he replied, I assume he knows about this thread.
[...]
There's some history of password changes Google+ has made so far based on bpip - but I don't see him having changed email in the last few months. But since email is private for some users - then I'm not sure we need to require them to post it publicly.
I just PMed by Google+. He shared a screenshot of his profile with me, showing his account's email address to me. It is different from the one shown by @alex2012. Given seclog didn't show a change of email from his account recently, I can vouch that he's not part of this scam-attempt/account-selling.
I'd also like to use this chance to publicly apologize for the inconvenience Google+ experienced because I jumped too fast and didn't notice the signs of doctored image.
nutildah and
Little Mouse, do you both mind to remove the neutral tag against Google+? I apologize to you both too for any inconvenience happened from your side.
He always can sign messages on some of his previously used BTC addresses to prove ownership of his account.
[...] ask Google+ to sign the message [...]
He did
sign a message at one point, but I am not sure if the address is still accessible to him.
Google+, if you read this [as I didn't write this on my reply to his PM, stupid me], can you confirm if you still has access to bc1qr40dwlh5wywg99967j0fc02es97mf0luzgvf3j or not? If you don't, it might be useful for you to... re-stake your address.