Although I agree with your suggestion, the reason for this is that Renderosity Merchants are told explicity in the guidelines to name it "Readme.txt". I see nowhere where they disallow "My Product Readme.txt", but whether or not naming variations are acceptable is not mentioned there. This is something that should be brought up with the Marketplace.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

Contact Me | Kuroyume's DevelopmentZone