Uh, Sure, if you have one account. The point being that if you're smart, you isolate every account. myaccount-aws@domain and myaccount-retail@domain and then turn off cloud services for retail account and turn on two factor auth for saas.
That's on you. You can't get the benifit of separation if you have them do it for you.
In the same way you get one company to own your domain and one to run your email. That way when your email provider decides you're a spammer or your account get's closed for uploading a bad app to the android store, you can go else where and swap your dns.