How Much Does the Average PrepScholar Student improve on the SAT?

I am seriously considering investing in PrepScholar's SAT program. On average, how many points does the average PrepScholar student improve by on the SAT?

Hello. You can find out more about PrepScholar on the main pages of it's site: https://www.prepscholar.com/sat/s/results2

The policy of ExpertHub is to be a universally useful resource for students. Thus to avoid having ExpertHub be the official Q&A arm of PrepScholar, and to avoid our own bias, we generally discourage any discussion (positive, neutral, or negative) of PrepScholar on Experthub. Thanks for your understanding.