Earlier quoted context omitted.
How are you bulk checking now? I've been in the industry a long time and it's always been a pain in the ass to do anything in bulk. I've had lists so big registrars didn't want to run them for me :( Using APIs really isn't an option when you have a million names and 1 per second limit. Automating a bulk checker, most of them disable/play with it after a certain number of times (so even at let's say 500, i might be ab…
Magic (and a lot of experimentation).
http://www.leandomainsearch.com/search?q=think
I clicked on five random ones marked available but always got '... is not really available' when I clicked 'Double check availability of this domain'
If there was a checkbox that said 'take more time but be sure of the available ones before showing me the report', I would have checked it.