This just happened -metaphorically - in the genealogy universe. Ancestry.com acquired Footnote.com's parent iArchive. The two websites are basically #1 and #2 with respect to fee-based historical/genealogical databases.
The modifier is necessary, since some might nominate FamilySearch for #2, but for religious reasons they give away all their information for free.
And that may just be one of the reasons for the acquisition. It can be difficult for for-profits to compete with not-for-profits on the same playing field.
These are just my initial thoughts. We will of course have to wait and see what happens.