Product Psychology (delightyourusers.com)

This as good until I got to E! The linked page is really the A-D of product psychology.

Does this leave a bad taste in anyone else's mouth? The phrase "people will love" was especially nasty. These tricks are explicitly about hijacking the brain's biases. Who actually loves that? Who loves Facebook as a product these days?

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The A-Z of Product Manipulation would be a more apt title.

This information you can find easily available online for free. Most of it is well researched in psychology papers.

I find the tile of the page dubious, this is no way to delight anyone, but to use their psychology against them. More like manipulateyourusers.com

Why this post has so many points?

They want you to unlock wikipedia articles for 4 dollars each?