I’m not even sure which reality show she’s from.
So we’re clear – these people are all being cast because the episode’s script called for a bunch of reality TV stars/tabloid fixtures. It works within the episode, and it’s minor.
HIMYM is not in danger of being cancelled, and I seriously doubt this is network-mandated. CBS is very satisfied with its Monday comedies (with the possible exception of Worst Week), and HIMYM doesn’t need any help in the ratings department. Viewership has been increasing every week since 4.02 aired, and Not A Father’s Day fell just short of netting the most viewers the show has gotten since Ten Sessions.