I know twitter records IP during registration. Will it also record IP during login everytime and also during oAuth? Can some one confirm this?
Its only Twitter people can answer this. Its a standard procedure though to collect those data on login.
I imagine they do collect your IP address, however I've personally not seen them utilize it to prevent you from accessing the site. When they ban a account it usually is only email and account wide not IP wide. Big sites usually don't ban IP addresses in this way unless there is a huge problem from you IP block. This is to prevent legitimate users from being effected by your actions.
No one knows whether they record or not? Because they do not mention anywhere whether they record or they do not collect. But from my experience, I can say that they collect personal information and personal information also includes ip address.