Interesting Plausible use case:
A user mentioned our custom goals and their newsletter provider didn't match for new subscriber numbers.
They installed a captcha to investigate. Turns out their provider is inflating subscriber numbers as they don't do bot detection that well.
Not sure how common issue it is but this was one of the largest newsletter providers.
Lesson: double opt-in is worth it on your newsletter for many reasons.
Fosstodon is an English speaking Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.