Check your facts, the design was not at fault, improper powder used in the issued ammunition was, but who really cares about the details right?
Oh, and I have yet to see a firearm produce a smooth sticky substance(often sweet to the taste) known as jam. I've seen many firearms experience a failure or stoppage but never jam.
Aside from the above, you're right. AR's are cheap in the US and they live in a moderately free country where such rifles are acceptable for bush work. That aside, the Robarm line isn't a hot seller, kind of like KelTec rifles aren't a hot seller. They're mediocre at best. The previous wonder gun from Robarm the M96 has all but disappeared. Such a great design, poor stamped steel construction and about $500 more than a stock 20" AR(In the US). Not to mention the two safety recalls for the bolt and trigger mechs. I don't see many at the range, in fact I've only ever seen one at a competition and it broke half way through the day. Odd how such a stellar design is no longer available?
TDC