Cannot scrape e-mail addresses with Srapebox

I had success at one time, now nothing works, as I select keywords and footprints, extract many URL's successfully (but without proxies, Loopline said it's a bad idea to use proxies for URL harvesting), but produce no e-mail addresses on second harvesting or e-mail extraction, even with very low thread number. I used China Company Data at one time with slower robot speed to better emulate human spider speed, but Scrapebox seems to be controlled by thread number only.

Thank you.