Words mean things
Seriously, the women described in this article are not “girlfriends”. The parlance is “mistress” or “prostitute”, and while I understand that men who resort to purchasing women’s affections would like to make it seem like something it’s not, I have to insist on proper terminology for clarity’s sake. For a woman to be considered your girlfriend, she should, at bare minimum, be eager to be with you, not barely tolerating you to get at your money.
Not that I’m really objecting to the women’s behavior in this. Exploiting men who have a lot of money and low opinions of women isn’t my cup of tea, but I can understand why one might do it.