Thanks for the clarification. I will probably try to create few new Moz accounts and check. I thought of creating another links list from just the backlinks. Seems it would not work. hehe. Moz can somehow detect bulk accounts it seems. Not sure how they do so as there would be probably hundreds of thousands of simultaneous users at one time. I have checked again and the API seems to work for a small task such as 10-20 urls. It only creates problems when it moves into hundreds and uses the multiple free accounts.
One thing that I have noticed recently in Scrapebox 2.0 is that when I check proxies in bulk such as say 90,000 port scanned proxies or public proxies in the proxy manager, the proxy manager gets stuck at times with some of the threads remaining active forever. I need to force close Scrapebox as a whole and this results in all the time spent in checking those proxies being wasted. The same also happens with proxy harvester at times and in normal harvester too. I am planning to purchase and use automator addon soon mainly for daylong proxy checking but if the tasks are not completed the automator would not be of much benefit I suppose. Is there no way to force kill active threads instead of force killing Scrapebox as a whole. The RAM and CPU usage is less than 30%. So, hardware is not an issue too I suppose for the threads getting stuck.
Any idea why that happens and is there any way so that Scrapebox force kills threads when the active threads are stuck for say 2-3 minutes.
I also have another cool idea for an addon. The domain availabilty checker is there in scrapebox keywords scraper. But if it is available as a normal scrapebox addon like the others then it would be more beneficial for finding expired domains etc. And instead of using only the .com, .net etc. predefined domains and adding those to the end of the words, there should be an option "I entered fully qualified domain names." as available in registrars such as dynadot.
https://www.dynadot.com/domain/bulk-search.html
The addon might import the domain names from the keyword. If it can do so from the harvester and remove the http, www, https parts, it would be even better. But a normal addon with import from clipboard would also be fine.
Many expired domains can be found in the harvested lists etc. itself and can be used in combination with the alive check, pr checker and pa checker. Just an idea. This can be massive tool for finding expired high quality domains quickly.
So when I mix and match those accounts with other accounts not created in that step those consistently give 401 and the others consistently work fine. 
