I think it was very unlikely that Mavens developer, Briggs Softworks or its principal, Kent Briggs, had any piece of Seals. His business model, as far as I know is to either (a) sell an off-the-shelf $500 play-money site server with no source and limited opportunities for customization through a basic API, or (b) sell the source of PM Version 3 (they're currently on V4) for around 10K. From the old Seals it appeared that they had purchased the old version and done some basic mods - converting to RM, adding a cashier) but not done some of the additional heavy lifting needed to keep up with the new features in V4 (lobby game filters, to name just one) or the increased demands of their users. Furthermore, from our dealings with Briggs, I don't think he would go jeopardize a very successful business (they market several other widely used non-gaming apps) by associating with a real-money poker operation run by Micon or anyone else.
Some of the other comments in this thread are however, right on point. The PM architecture is incredibly robust and well tested. As for Grid-who knows? But I'd bet that the number of hands played in the wild by their system is just a fraction of that for PM. So maybe we should not be too surprised with their current problems. A further question is what technical and/or financial resources Micon has at his disposal to take care of these.