If it looks like the account is being accessed from a location that we're not used to seeing, we may suspect that the account is being compromised and will take steps to halt any further activity. In most cases, these kinds of locks and suspensions are easily overturned- and having an authenticator on the account helps us to see that the account was secure. I won't be able to go into further specific detail as to how our detection processes work, but that's the basic gist of it. I don't want people to think that we're going to take away the account if you use a service to help make the game play better. Just be aware that using these services sometimes causes issues which may necessitate that the player contacts us to resolve.