My point as well, whilst not knowing the details of this case, I have received similar type of offers (by mail) from a Dutch company inviting me to join their German Tatslotto buying syndicate. Amongst the papers is an IRREVOCABLE authority to be given to my bank authorizing them to take out moneys regularly until cancelled by both of us in writing.
So if I wanted to leave the syndicate I would need the syndicate approval before the authority could be cancelled, else my bank would have to continue to pay the moneys until I closed my account with that bank and went to another bank.
As the authority is addressed to the bank closing and reopening an account with that bank, or transferring to another branch of the same bank, doesn't invalidate that authority and it would have remained in effect.
Didn't do it because I'm no sucker.:p
Peter.