I have to agree here, generally there's quite a few business cards that are simply useless. Even if you could read that small perfectly printed solid color text, most of them use cmyk colors where the raster effect makes the thin lines blend into each other, not to mention the white text on black backround that very often makes the text just vanish due to the dot gain. At the moment I don't see much of point in submiting business card layouts since theres no point in competing with designs that look nice on screen but can not be produced with normal cmyk printing process that is mostly used in business card printing.
For this market place to grow and to keep up the standards, I would say that business cards for one should have a production price estimate, or at least detailed information about the printing process required.
I mean there's quite a difference between the "default" one sided 300g/m CMYK business card and the 600g/m custom shaped CMYK + 1 spot color and spot UV varnish. If you don't trust me, call your local printing company.