Becky quit her job because when they were only dating for a few months Amber said "babe, we should do YouTube together and it will be both of our jobs." She did this right after she moved into the shanty because she had no one to drive her to Walmart and fast food places during the day. I remember the brief Rafe drives me around and leaves me at the mall all day saga, where Amber was complaining that she had no way to get around and do things. After she convinced Becky to quit, they did a few videos together, but it went quickly back to being "MY channel"(Amber's channel) when Becky was secured as her full-time chauffeur and butler.
I'm not saying Becky isn't lazy and fully capable of getting a job, but she stopped working because of Amber's insufferable whining about not having rides and the (lah) promise of them both using YouTube as a "job." It was a bait and switch on Amber's part. It's unclear whether Amber regrets it, since now she essentially has a large child instead of a girlfriend, but these are the facts.