^ what Lady said, and also:

Thom for one is pretty openly two-sided about a lot of things (for example, he's totally fine with women playing Quidditch when it's a talented woman playing for Puddlemere, but publicly mocks the Holyhead Harpies on the reg). He'd probably gladly and enthusiastically make a business deal with someone who was 'new money', but wouldn't include them in his social sphere. He might invite them to some of his larger events if they seem personable, but those would probably be events where he's inviting select upper-MC folks anyway. They definitely aren't getting to be his best friend, because his best friends are people he's known since he was three who were in all the same UCPB playdates that he was.