I have no idea why this has a separate thread, but okay.
You can only blame so much on an actor. Vanessa Marcil did a full year on the show and was supposedly willing to commit beyond had she been accommodated or made happy. She wasn't - she had to fight to stop a love triangle with Brenda, Sonny and Sonny's son, and she reportedly left unhappy. She took her out. That's on the show, which mangled her story for a year. Jonathan Jackson came back for multiple years, and only left because like Vanessa Marcil, he'd been sold a bill of goods promising him one thing story-wise and giving him another. Another major issue was that they'd also promised him a lighter schedule and less grueling emotional story, and reneged. He took his out. Again, that's on the show, not the actor.
I know what it's like for a show to be held hostage by a character or actor; I watched OLTL starring Todd Manning for twenty years, and for most of those twenty years the show was beholden to Todds #1 or 2 at regular intervals. I don't think the situation with Robin Scorpio is in any way comparable. Kimberly put herself out there, made herself at their disposal and Ron and Frank mismanaged her time and her story. They have done this several times before. They did it with a lot of actors at the end of OLTL on ABC, including GH's Ted King who got totally screwed in his year on that show, partially because from what I understand Ron didn't even really want him there, and by the end the character was just a plot device for him and a nuisance for the viewers. As it is now, Patrick and Emma have no heavy story. Nor will they have any heavy story without Robin, because RC has no interest in writing it. So who's being harmed? Robin can come in and out - she is an iconic character played by an iconic actress. That's who, IMO, the majority of the viewers want to see. That's all they want to see with Robin - Kimberly McCullough. And when Kimberly was on contract for many years, they were always islanding her off in story corners with Patrick anyway. Why is the burden of commitment suddenly on Kimberly McCullough to accommodate GH? She's been doing that since 2005. It's not like she was Roger Howarth at OLTL in the early 2000s, taking outs every six months.