I think a major difference in the M305/MP44 issue is who is buying the rifles. The M305's are not being bought by collectors who've dreamt of owning a real M14, they're bought by shooters looking for a cheap, centrefire, semi-auto that isn't an SKS.
The SSD repro's are being bought by the collector's and dreamers.
This site is primarily designed for the collector and collector/shooter. That's why you'll see the M305 in the non-milsurp forum and the SSD rifles in the milsurp area. Both rifles are equally welcome here, they're just going to be in different forums.