I agree with the majority of your post. But, I HAVE met quite a few who ARE on SA just bcs they are younger seeking older. Why? I do not know. But say 20% of the friends I've met there are with me for fun and not allowance. Do I pay for coffee at Starbucks, or a hotel, or maybe dinner? Of course! But to those few that are ok with it, I do not offer allowance, it hasn't even come up in a couple cases. Far better batting average on SA for me than silverdaddies.com, and others.
I don't refute what that site is there for, why sugarbabies are there, or that I do offer allowance often as not, etc. but with patience I've found "more" there than just those looking fo ca$h.