I imagine, and this is purely speculation, that Spencer had a lot of stock leftover, PCBs, drilled enclosures etc, that he purchased to build Darkglass stuff.
Seeing as the design of a circuit is not copyrightable, only the actual physical layout/design of the PCB, seeing as Spencer did those layouts whilst on board with Doug, he's well within his rights to release these pedals (pending any specific contracts between the two of them that may specify otherwise).
Of course, the moral standpoint is rather a different matter.
I get the feeling that a lot of people won't come on board and will stick with Darkglass, simply based on my perception of the general feeling on forums etc. Especially seeing as the price point for Pike isn't anything special.
Si