interesting list. I only have the Nest skill installed from that list.
Saw 2 more for products/services I have. That's probably the first thing to fetch is skills for anything you have/use. Spotify, Nest, Fitbit, etc.
I have very few skills installed (wish Alexa made it easier to see that list). Most of them are as I suggested, services I use. I do not and will not have my $ hooked up to Alexa. So no banking app or amazon shopping enabled.
I'm a very boring user, I reckon.
I have a fair amount of automation, lights, door locks and Echoes in every room. Alexa gets used for handsfree activation of stuff more than anything.