Probably a feminism thing honestly.
Sabrina makes fun of men constantly. Her music is geared towards a more diversified audience since she doesn't just to sexual shit and makes music. Her sexuality isn't her only talent or selling point.
Sydney's only claim to fame is her constantly getting naked on camera so it's only going to attract the male gaze mostly, and in some cases it's a little heavy handed. Like the gambling commercial.
Not saying I blame Sydney, if I was a hot girl like that I'd rake in that cash too. Also her being a right winger probably doesn't help her out too much I'd imagine