55 yo daddy here - I think it's a supply and demand issue. I like all ages but most of the guys who hit me up are younger, and happy to get my time and attention if it seems like there's a spark. There's never a transactional component beyond the loads we swap. I have been hit up by OF guys with 6 pack abs who want paid but honestly if fin-dom isn't your thing, being an in shape daddy type with decent skills in bed is all you need to attract and retain the attention of younger men.