A video auto-started on the page, and I couldn't even find it to stop it.
Here's a screenshot, everything in red was blocked: https://i.imgur.com/pAEMBxD.png
That's 84 requests blocked (54% of the page, 14 domains blocked out of 16)
To do this, in Advanced User mode, under 3rd Party Scripts and 3rd Party Frames, click the left-most cell pair to make them red. (right-most pair is settings for the current site only, left-most pair is for every single site, ie default settings)
A middle ground sure would be nice.
I respect Arduino for what they have done for the maker and tinkerer scene, but landing pages like that will not keep me as a visitor.