Every historical record match that I've seen on MyHeritage (or more accurately, glimpsed through the paywall) has been from FamilySearch, which is free. MH is not actually a repository, but a data aggregator: a specialized search engine. Since much of its material comes from otherwise free sites, this results in countless instances of attempting to charge money for freely-available data.
One thing I find especially annoying on MH is that they make no distinction between historical records and user-submitted conclusions. They present tree matches in exactly the same format and wording as record matches.