Probably didn’t like being brushed off too much but not too worried either. Europe was substantial part of his scheme, and he could lose investors if they asked Rothschild for reference, but that would be highly unlikely.
Rothschild had no reason to advertise the fact that he rejected or was even approached by Madoff, and Madoff was not going around telling people about those who rejected his thinly disguised supposed front-running “service”.
After all, the recruiting tactic was telling everybody about the ones who already belonged to this very exclusive “investment club”. And they had plenty of “whales” and politicians to vouch for that, and many more that wanted to belong.
We only recently started to find out about those who rejected Madoff, because now it’s being advertised like a Good Housekeeping Seal of approval.