I'm looking for a UX/UI/Usability resource website but can't remember the name. And I'm not able to find it through google either. It was a very helpful resource, so I'm hoping someone here can help me out :)!

What I remember about it:

• It has concrete examples of how they implemented or changed the UI/UX of a certain site. ("We changed this button and increased conversion by x%")
• There is a paid or pro subscription of some sort for weekly or monthly mails
• It is in a long list form as far as I remember.
• I think the they use representative UI Screens (no actual names of companies)

Thanks in advance for your ideas!