Only a very small fraction of established domains make $40/yr just from parking. Take away the ones that are tms or are getting traffic from previous website links and that fraction grows even smaller. To any newbies don't expect any significant revenue from new tlds, especially a registry that just launched yesterday, literally. I would be very surprised if even 1 name out of those 300 makes that from ppc. Newbies investing in .science and other new gtlds don't base your investments on ANY expectations of seeing significant ppc revenue, at least not in the short term. Invest smart.