My understanding is that the GFGU shares were issued to RME as restricted shares, shares initially issued without a public offering, and hence cannot be sold on the open market. The piggy-back privilege allows RME to latch onto the next GFGU registered public offering, including their shares as if part of that registration, and freeing them up to be traded openly.
I think it's also understood that through some magical slight-of-hand, in spite of some confusing terms restricting transfer of the shares, that SPNG will end up with the shares as a result of some confusing terms permitting the transfer of shares specifically to SPNG. Don't ask me how.
