Ironically, the website has horrible ui. Who thought that sidebar would be a good idea? Also, that huge newsletter sign up form just turns the site into click-bait.
Well, the advice was about optimizing calls to action and flow... as to the sidebar, I didn't even see it, I don't go fullscreen on my windows, so had to make it larger to see it after seeing your comment.
For me, I've moved away from trying to use any hover events for critical interaction, like that sidebar has. As tablets/phones are becoming the default choice, it makes sense to cater more towards that environment. The one thing that does stand out, is making sure to indicate there's more to read/do down the page, and the lack of an ever-present scrollbar in phones/tablets is a big one here.
Some points are about UX, others are about marketing and conversion... "Good" is from the POV of the business, what is best for the business isn't always what's best for the user. I, for one hate the large call to action/subscribes that pop up at the bottom 1/3-1/5 of the screen, such as on this site.
I for one thought it was a pretty good advice for UI, especially for landing pages. A good landing page can make all the difference and it can be a pain/time-consuming when it isn't your specialty.
