No matter what size/shape/age a provider is, there will be someone who will want to see them. But it is a matter of supply and demand. Younger, More Athletic builds will, I bet, tend to be much more in demand than someone older and heavier. This may be LA LA Land, and 'the industry' dominates a lot of the fantasy around here, but it's bears out when you look across the country. If older woman were in demand and more popular, our entertainment culture wouldn't be dominated by 20 somethings.
I also think there's a lot of genetics going on here. Sex and procreation are very tied together, and a lot of what we, as guys, find attractive is based on what our brains are genetically wired to find as good partners to make babies. That's regardless of whatever our immediate goal in seeing a provider is for. We find attractive what we were raised to find attractive, but also what our genes tell us to find as well.
As for a Hobbiest being Older and Heavier, so he should be okay with older and heavier providers as well, that's just crap. In the civie world, that may hold water, but this is not the civie world. A hobbiest looks for the kind of girl he wants to be with. The one that fulfills whatever reason he has for going to see a provider. His age and shape have nothing to do with his desires. But I get pissed off at the guys who trash older girls, or heavier girls. They are not my thing, so I don't choose to go see them. I won't trash them for being on TER though.
I will call out a provider who is clearly in their 50's but showing photos of themselves from 20 years ago. That's false advertising.
play safe,
DkG