With the 0.84 contracts, does anyone put the special characters on contracts? and if so, for what categories, duration and how many scenes per week?
It depends on a LOT of stuff. I am not a qualified as some people here, but i'll try to give some tips.
First, if you play with model retierment, the contract stop the process. So at some point, if you want to keep the pornstar, that's your only option.
The idea for a contract is to sign a model with great potential that did not reach full fame, so that the contract is cheaper, but with a decent depravation, depending on what scene do you want to play. The question of "for what categories" depends mostly on you : what scenes do you want to work with. If you do not know, FFFM is a good middle groud : it's usefull to have a contract because the scene is expensive, it's popular enough to bring good money, and it's not too high on depravation requirement.
The "best" way would be the raise depravation around 55 to 65, without working on fame (so no marketing specialist assign), then sign a really long term contract with everything check to FFFM (but then again, will you play 2 years in game time ?) with 3 scenes per month (more is useless because of scene penalty). Then you put a good marketing specialist on the girl, that gain fame but without the scene cost.
Problem of this method is it's very expensive on signing, and it tooks a long time to be worth it. You get 36 scenes a year (most likely less because of random STD etc), i leave the calculation to you.
I put all the special characters that are pornstar on contract after a few scenes, and i think you should if fame is above 75 and you are making FFFM, MMF or GB.
For the tips : signing a bad male actor with huge potential can be really good. They are cheap, can make 2 scenes a week and always have full depravity. After some month the guy boost every scene he is in, making him worth pretty fast. I think it's almost mandatory for MMF or Gangbang scenes, because the alchemy between the male actors matters. But obviously, it is pretty useless without good actress.