Stop sharing account information to sign users up for another website
Just a liiiiitle (a lot) ridiculous that I check my spam folder to see that I have apparently signed for email ads from mydirtyhobby.com.
I know that YOU sent them the email I provided (to you, xtube).
Respect your user's data and for heaven's sake at LEAST respect their preferences.
In this case please contact Xtube support —> https://www.xtube.com/contact
So they can have your email and check why this is coming to you.