Ancestry com. (popular in North America) and My Heritage - with a smaller data (popular in Europe), started as small companies helping people build their family trees, and offering genealogy info on migration.
Next, they entered the DNA industry offering genetic testing kits and analysis. ( Ancestry uses saliva sample, My Heritage - cheek swab). That's quite a fascinating industry! They offer paternity tests, ethnicity tests, health screening tests, and more.
In Israel, My Heritage and its partner Billion Graves (collecting cemetery data) are the dominant genealogical companies.
I have some experience with Ancestry com. In 2006, I was trying to locate my grandfather's family descendants in the USA. I started with almost nothing, but I managed to do a good job using data from various sources, mainly Ellis Island and Ancestry com. records.
I have no experience yet with My Heritage, but I often find myself asking questions about its partner , Billion Graves. I suspect the latter buys all the data regarding cemeteries and graves from the relevant state offices, and monopolizes the rights . Unlike in the past, when you could easily find online info, now, you have to subscribe to them, if you wish to get it.
At first, I said to myself, oh, well, it seems they offer work, employ ׂׂyoung people (probably students), and send them to cemeteries to take pictures of the headstones. That's an easy, convenient job for them.
Lately, I'm not quite sure about that. The company has remote control equipment, and uses various gadgets; the people with the camera could well be volunteers, not paid workers (the fine weather here during most of the year, draws people outdoors, and even cemeteries are an option for volunteering or other sort of activity).
I'll have to do some research. Not that it will help me or others much. We have to face it : we live in a capitalist society, in which the State gives away its resources placing them in private hands - cemeteries and their dead inhabitants included. Sad.