I do think you can link the same account to multiple of the options given, but if you want to be sure of whether that is true, use this link to get started with getting support from the devs. skullgirlsmobile.com/contact/
I have enough to fully invest into one of them at the moment, but will probably keep saving for both of them at this point because I am only three million CC away from being to do a full investment plus MA on each of them