If you have a Premium family site subscription, you get full access to two of the paid collections in the MyHeritage search engine: MyHeritage family sites and MyHeritage members.
If you have a PremiumPlus family site subscription you get full access to all four of the "MyHeritage collections": MyHeritage family sites, MyHeritage members, MyHeritage family trees, and MyHeritage photos.
The MyHeritage collections are unique and cannot be found anywhere else on the internet.
You’ll need a data subscription to access the rest of the paid collections in the MyHeritage historical records search engine. Free collections are available to everyone (for example, BillionGraves and Social Security Death Index, etc.).