It's a smart move for them as most people won't understand the difference between matches and DNA cousins (or IBC/IBS vs IBD).
There's nothing written about the capability to do triangulation, it's the same offer basically as Ancestry is offering, just with the exception that you can upload DNA tests from the two other companies.
So it's like Gedmatch without triangulation, just looking at your 1-to-many list.
Obviously they have the power of many family trees behind it but again, people will spend countless hours trying to figure out how they are related when indeed they aren't (in recent times) and just IBC/IBS.
Oh and I find the headline misleading as well (in the usual marketing bla bla that Ancestry is the best at).
Read the small print and realize that their matching service will become a premium service (which obviously means not free!):
We invite such users to export their raw DNA data from the service they tested on (which is straightforward) and import this data to MyHeritage now, so that when our DNA Matching service is released soon, they will receive matches immediately, and at no cost. Later on, DNA Matching may become a premium feature, but it will remain free for users who upload their DNA data now.
It's just free right now because they need DNA samples to build up their algorithm.
As a side note - not really OT - my new website on DNA genealogy tools finally starts it’s beta test on the 1st of June. It will guide the user through the process of triangulation and help him avoid errors (meaning differentiate between IBC/IBS vs IBD). It also offers private groups for all your DNA cousins that descent from a single common ancestor to work collaboratively on finding the MRCA’s and CA. I might want to add that I'm already working with Chris to integrate WikiTree into it but Gedcom upload will come first to give access to everyone to upload their family tree information.
There will be a free version (manual) and paid versions which are semi-automated & fully automated. More to come soon, please bare with me. If you want to know more, email me privately through WikiTree PM (http://www.wikitree.com/wiki/Basso-23)
I'd like to reference to the excellent blog post that Roberta Estes has written about companies in general where one can upload raw DNA data and the specific parts of interest (at least that I think are of interest, please read the whole post) in regards to MyHeritage and it's recent announcement.
Her post: https://dna-explained.com/2016/05/25/beware-the-sale-of-your-dna-just-because-you-can-upload-doesnt-mean-you-should/
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