I would assume Founder rank means you backed the game during the Kickstarter aka you get day 1 access to the Founder's World which is normally obtained by reaching the rank of Elite in one of 3 categories for normal players.
Either way, not bad. I've actually been making a lot of money as of 1.3 myself, I see a lot of threads about people complaining they can't make money now whereas I've made a lot more than I previously had. I'm no professional player by any means and I only play a few hours here and there but I feel i've been making good money. I made 6 million in around 3 hours across 2 days flying my Diamondback Scout and Vulture in conflict zones, blowing up Pythons and Anacondas at 50 to 70 thousand a kill.