no to legal brothel because they are not legal. High end escort service is something that is planned eventually.
For the porn work it is a combo of balance and realism. In real life some might get several gigs in one week then nothing for weeks or even months. So as a simple way to have what our research showed was the average for a up and coming porn star was about once a week and it works well for money balance as well.
Thanks for the reply, I didn't realize you were going for realism with it (since I am also strongly inclined to favour realism I can't complain. Still, I think there should be some way to access the sauna that does not involve being trafficked or blackmailed for a few months, for example through mutual acquaintances, someone you meet at the club or disco or something like that. As far as I know the only way to do this is through the two guys you can meet at the city park cafe, but that quest is a bit over the top).
I think the way porn work is currently balanced (As far as I have played with the system) by hardcapping the number of shoots you can contract per week, results in a situation where you can not leverage your beauty and reputation to contract more basic boy-girl scenes (for example) every week in order to make more money. Rather, you can only make more money by contracting more extreme scenes. At the same time, gangbangs and the like are open to you from the beginning. I won't say this is unbalanced, because it technically isn't, but the meta for making money is just to contract the scene with most participants each week, as fast as you are allowed to start picking what scene you want to star in, and this equilibrium does not track how new pornstars actually tend to work (so my pet peeve with it kind of is that it's nudging you to an unrealistic playstyle). Perhaps a system where you do not have as many options every day, or where better paying scenes are relatively rarer would work better.