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I think she's just trying to get away from her current social circle.
The community and viewers have literally tied her to Vedal and everything she does is viewed through the prism of interacting with him.
Plus the constant and long ago inappropriate pressure with the wedding sub-goal, which she has been trying to escape from in every possible way.
Most likely, all her attempts to lose weight and get in shape are connected with a possible meeting at Twitchcon.
But she can no longer handle this pressure, neither psychologically nor physically, and just gave up.