She is relatively young, very fit and hot, and an incredible player. Given that she also had a very popular song out of nowhere in her solo project with the Disturbed guy on vocals, her profile is probably extremely high right now. As far as the issue of jumping off current obligations to grab a "better thing", Pete Thorn addressed that in an article I read. He said he let a much better opportunity pass at one point because he was otherwise engaged at the time, but later regretted it and would probably just take the better deal if presented with that kind of situation again. None of those sideman gigs will last forever or yield passive income unless there is a new album that hits really hard. I'm sure Alice will take it in stride and wish her well.