What we measured scraping a 28,734-member Facebook group
An ordinary member can reach 4,240 of them, or 14.8%. Zero of those 4,240 listed an email. And the reason a weekly monitor beats a one-time dump.
Blog
Things we measured, and were surprised by
Not announcements. Numbers we had to go and get ourselves, published because the ceiling on a scraping job is the thing you most want to know before you start, and nobody prints it.
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Why headless browsers never pass Cloudflare
Not the webdriver flag, not your wait times. It is Runtime.enable, which means the published advice on this optimises the wrong variable entirely.
Letting Claude build the list itself
Seven tool calls turn one sentence into a finished table. The interesting part is the call that appears twice, and why the tools carry a filling flag at all.