How use your TMUF login as TM² login

[mariake]

Hello

As far as I understand there are no advantages / rewards for using a TMF login with TM2, right?
If such rewards were added to the game in the future, would I still be able to gain them by linking my TM2 account to my TMF account later, or do I have to do this now (when signing up for the first time)?

Thanks a lot!

[kalimerre]

You have to do this for the first time (when you sign up).
After your account is created, there will be no more changes