Many traders would, unrequested, fill unused space on the C-60 and C-90 tapes of demos they compiled for fellow traders with local bands in which they were members, or acolytes of. This led to a musical cross-pollination between geographically diverse and disparate areas such as Scandinavia, USA and the UK and their own bands/scenes.
Many traders would, unsolicited, fill unused space on demo tapes of recordings made by bands they were involved with, including those from local musicians in their network. This resulted in musical exchange between geographically diverse and disparate music scenes such as Scandinavia, the USA, and the UK, and their respective bands/scenes.