[Tactics]

Netflix need for increase of subscribers is no different than committee need for source material sales boost.
Isekai and CGDCT sold well and generated more writers than other genre in Japan so we got a barrage of it. If Netflix data shown Isekai and CGDCT are the one doing well on their libraries, then it won't be different. Them funding titles like Eden Zero, CG Saint Seiya and JoJo: Stone Ocean is reflecting how shonen did pretty well on contributing numbers than most of their original titles.

It down to either Netflix focusing on more popular attribute for better subscribers number to keep things alive or pull the plug and not looking back.

It already happened on several anime streaming service. At first it looks like they have nice selection of titles; as time goes it started focusing on what makes their top dog popular for effectiveness and efficiency. Service A, Fairy Tail have highest amount of viewers, grab all actions they could; service B, SAO is popular, power fantasy and isekai easily dominates their licensing choice (it helps that they're cheaper than big titles), things like that. They didn't completely ditch other genre, but surely you can't expect every works is a big hit friendly to casual audience like Spy x Family or enticing enough to ensure mouth-to-mouth marketing like Edgerunners.