Interesting site, it is good for signature campaign managers, but the estimated price is high, because I compared between my account price on Bitcoitalkaccountprice.info and on your site, there are great variation, I think you should change some criteria for making it reasonable.
Price account estimator shows high values because it wasn't updated for a long time. Price checker was created in the time when bitcoin was worth around $400 in January 2016.
AFAIK Bitcoitalkaccountprice.info is being updated pretty frequently. All in all, price of account is not something that can be estimated by a script that easily. Don't follow it.