How to Get Moz Account in Bulk?

I have Scrapebox and Page Authority Addon. And I want to check the statistic of many websites. But I need a ton of free moz account in order to run page authority addon (Moz Pro is very expensive).

When I tried to create a moz account I always encounter an error like "You have created too many accounts, please try again later".

I want to get moz account in bulk now. How to get them?