>I've always wondered why that behaviour emerged..

Because they share the same roots, the same general "scene". The demo groups and the crack groups always mingled. We were all "sceners". Tons of groups had a presence in both areas. Most of the graphic artists and musicians were mainly part of the demo scene but lent their talent here and there.

(Computer-wise I grew up in the C64 and the Amiga demo scenes during the early-to-late 90s.)

alt.binaries.goodtimes