The half of young women willing to marry the ugly millionaire is of course scary (unless you're an ugly millionaire), but then, the question answered to was not of a specific ugly millionaire, but of a generic (hence personality-less) ugly millionaire. In that case the question they were really asked is really this : "Could there exist an ugly millionaire such, that you would marry him?"
Of course, that means that all the ones who answered no are very shallow people... but being young, that is to be expected.
1) A millionaire is not much these days. Billionaire should be the goal.
2) In 1 Kings 1, Abishag marries King David:
When King David was very old, he could not keep warm even when they put covers over him. So his attendants said to him, “Let us look for a young virgin to serve the king and take care of him. She can lie beside him so that our lord the king may keep warm.” Then they searched throughout Israel for a beautiful young woman and found Abishag, a Shunammite, and brought her to the king. The woman was very beautiful; she took care of the king and waited on him, but the king had no sexual relations with her.
This was actually a win, win solution. David didn't live very long after this marriage, and the girl was still young and very beautiful after he died - and fantastically rich by the standards of the day. She had more royal suitors than she knew what to do with.
So a young woman marrying a *really* old and *really* rich man (or vice versa) makes a lot of sense - provided you like them as a person well enough to live pleasantly with them (despite diminished sexual attraction).