Interesting then - how will new inventions appear on the "market" under communism?
I capitalism it is quite simple - if I have made it - I can go and sell it myself either through a retailer/reseller/publisher, garage sale, ebay, whatever and get $$$ in return.
And then I can see if there is a demand for my product - maybe I will produce more.
Unlike Soviet Union which sometimes produced something way more than neccessary, and sometimes not enough.