Quoted from KingBW:Wild Speculation:
Slash liked WOZ and owned one. He requested a DI be present back stage at 1 or more concerts (Joe at PinballStar brought 1 to at least 1 of his concerts). Maybe … just maybe … he approached JJP to make a GNR pin. Or mutual chit chat between them brought it up and Slash made it an easy license to get. Sometime that story will come out.
This is what I thought as well. It’s what makes me think GNR could be something really special. If done right I’ll be in day one.