But you are losing out on some anonymity here. The VPN provider may not know who you are but you are consistently making access with the same user ID and from t

But you are losing out on some anonymity here. The VPN provider may not know who you are but you are consistently making access with the same user ID and from the same IP. Your activity can be correlated to that account and that IP. If that's not your aim (like you say - being signed in to the same facebook account all day suffers you the same problem) then this isn't an issue. But this isn't what a lot of tor users want tor for.