That is, when you create D, you can link D to A, B, or C, but not A and B. This grants bonus AP to A,B, or C. Likewise, if you rebirth A, you can link A to another character (I have not rebirthed with a Hero talent since, so this is an assumption).
Flagship was one of the first of the traditional merchant account providers to offer free account setup, with no application or account setup fees being charged. The company was also among the first to offer true month-to-month contracts, with no early termination fees for closing your account.
GM Financial is a wholly-owned subsidiary of General Motors Company. Ally (formerly known as GMAC was a subsidiary of GM, prior to its disposition by GM in 2006), is a bank holding company that also provides financing products to auto dealers. GM Financial and Ally do not have a mutual majority shareholder, nor is one company owned by the other.