In the modelling business you are supposed to suck dick or you just disappear.
I can think of only one model who made it without sucking dick, Barbara Palvin and she did disappear for a while but was still so popular they had to bring her back on to shows.
With these video game face models it's very much the same, although Kojima is going for established Hollywood talent and I genuinely believe he doesn't do the casting couch stuff.
Joosten probably thought that that was how it was done so she didn't spread her legs for the next japanese producer, and thus disappeared.