Far be it from me to get in a pissing match with you, but for everyone you quote above, there are other stories.
Money From Scenes: Most of the talent I know don't make as much as you quote above or book that easily. And they are very hot and do good scenes. As most other posters say, some leave so quickly that it is difficult to get any additional marketing from them after a few weeks. Probably 50% of what is shot never makes it to the market.
Money From Cams: I'd say more like $50 an hour, based on models when they are honest, and discussions on stripperweb <admitted heresay.
Feature Dancing: Don't know shit about this, but again, on stripperweb, they don't seem too happy.
Escorting: $1400 may be what touring AGENCIES get, but the talent gets half or a little more than that. Regular escorts get ..... $300 - $500 even if they have done a few scenes. Unknown girls get $200/hr average.
Website: So many solo girl web sites have gone down, and so many never made money at all.
Overall I'd say your figures represent the top 10% of the market. Either that means you only work with the best (perhaps only they can afford your services) or perhaps that has simply been your experience.