A lot of people - dirty minded people - like to believe in the R rated stuff. In some cases sure it may be true, but that's not the case every time. But nope, that's the stereotype that has been created. X sleeps with Y, Y sleeps with X, etc. Who knows what's behind this ugly world of BW. It's not always what you expect - or maybe its exactly what you expect. Idk.
I think they send messages to the directors and to the producers..make themselves relevant to them..hang out with them..send them gifts...these days, sleeping with a producer or a director is not that common...
an example is Karan Johar, who used to be by SRK's side all the time..when that stopped, the movies also stopped coming SRK's way..now you see who he hangs out with, which means they will be the ones in his productions..