Her album did fine and that's it. The thing is, It's not like she is selling singles, touring or building a brand as well as getting average album sales. She doesn't really have a lot going for her as a recording artist unfortunately. Not enough to keep her signed to a major label anyway..
Not surprising, Sam was never a Syco type artist. Plus, getting pregnant was a mistake as far as her career goes. But I'm sure she will be fine without them nonetheless.