What you have discovered is that Chess.com has a number of outdated pages online. It does not make much of an effort to keep the site content consistent or updated.
If you want to know their current policies, look at the content you find on V3.
Upgraded Account - Diamond
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v3 is the new version of the site. You can view it by clicking 'Try the new Chess.com!' at the bottom of... nearly every page, I think. Once there, there's a button at the top to return to the old Chess.com (v2).
Regarding Diamond membership benefits, I don't know which is true. I never finished enough games during my free trial to see.
I would like to upgrade to Diamond but i found a contradiction in the website. It looks like in one page where you can subscribe , it mentions that you can get unlimited Computer analysis however on https://www.chess.com/home/computer_analysis_demo page at the buttom it mentions "Platinum/Diamond members get 25 games per week at an analysis strength of 2500"
Can Anyone explain the difference for me please?
Does it mean that i get unlimited computer analysis but only 25 of them will be at strength of 2500? Thanks