The slowness is intentional. I wanted to make it look more like a user doing it than a script so it doesn't set off any alarms. I have it waiting from 1 to 3 seconds between clicks to slow it down. :-) So far so good!
you could split to buckets like alphanumerically and parallelize it if you don't want to wait that long. Probably need to launch a few instances but still cheaper lol.