I think this is where these discussions always go sideways. You do not need to take any stance on RMT. Daybreak cannot reliably control how people choose to acquire pixel configurations outside of normal game play without introducing other detrimental/unwanted effects on normal game play while other aspects of it are entirely beyond their control. If Krono doesn't exist, the 3rd party sites still exist, farmers that sell items still exist, and certain pixel configurations still have a $ value. The preferred exchange method just happens to be Krono at this time which probably works out better for Daybreak than the preferred method before they existed.