Exactly this was brought up multiple times specifically by @alphacore. Our goal is BALANCE. FAIR! If you have 15 SP and expect $2 from ShadowBot first day you better be dreaming! But if you re-invest all your earnings and grow to 1500 SP in a few months, ShadowBot takes notice and rewards you more and more. With this new metric in place, it allows the bigger fish to come in and earn while still letting the smaller minnows get some boost. Remember EVEN if you do not earn a single vote your Shadow Rank can go up and your Steem Power going up even just organically will boost you OVER TIME to the front of the pack! Those who you see earning a lot on ShadowBot have worked hard to get there and provide valuable long term commitment and content to the steem community !