There are a variety of reasons.
>1. Housemothers who watch the anime with their children are fujos.
This doesn't just apply to Anipoke either—almost all kodomo anime are starting to fujobait. In doing so, they secure not only young audiences, but also their moms.
>2. Fujoshi are more likely to spend money.
There's a reason the term "fujobucks" was made. Fujoshi are notorious for spending ridiculous amounts of money for their husbandos and ships, whether it be buying multiple copies of the same BD or merchandise like keychains, posters, and magazines featuring articles about the anime. Compare this to male otaku, who themselves are notorious for being useless hikikomori with no money to their names.
>3. Fujoshi interact with the series more.
Yoshiyuki Tomino, creator of Gundam, once said fujoshi saved the series. When he was about to stop making Gundam, it was only when he saw the fervent support of fujoshi ("female fans") that changed his mind. Believe it or not, when an author sees someone drawing fanart or reads a message praising their works, it really does encourage them. Fujoshi, or at least women, are far more likely to draw fanart than a male otaku. This "interaction" also serves to spread popularity of the anime. How many anime and manga have you gotten interested in because you've seen cool fanart of it? At least one or two, right?
>4. Fujoshi participate more.
Whenever an anime or manga does a popularity poll, the "fujobait" character more often than not wins first place. This indicates fujoshi are far more willing to participate with the community. Taking a look at the large female presence at anime convention further points towards this. By all right, the waifubait character should be winning, considering male readers vastly outnumber women, but... that doesn't happen. Why? Whatever the answer, it should be obvious why an author would be more willing to pander towards the side that actually cares enough about the series to "participate" in it.
