We totally understand any concerns about manipulation of this rewards system and any consequences that are damaging to players' experiences. We take those concerns seriously.
The reward system will probably be tweaked, balanced, and adjusted as we see how it plays out in practice. It's also designed for high-volume play; there will be some odd artifacts of smallness until we have more players.
We want the amount of bonus scryp you get for extra tasks to be eclipsed by the reward you get for completing a new system. We may need to adjust this proportion to cause that effect.
We can't make a perfect guess at the difficulty of a system in an automated fashion. Whether or not solving a system early is better depends on the efficiency of other early solutions, including the creators. Rewards can therefore increase or decrease over time.
Our goal for this whole reward system is for folks to make and play more of each others' systems. We're not particularly trying to encourage hyper-optimization of rewards, although we're reluctant to tell you how you should play.
However, deliberately manipulating system rewards in ways other than through the design of a system isn't cool. Using a bot to artificially inflate or deflate a system's value is something we would notice in our stats and take steps to stop.