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From you on this form we collect your email address. We use it to send the verification link, identify your account and contact you about it. To limit abuse, each time we send a verification email we also store the network address your request came from (your IPv4 address, or the first 48 bits of an IPv6 address, which name a network, not a device) and a one-way hash of your address, with the time; it counts for 24 hours and is deleted by the hourly cleanup, normally within 25 hours and at most 48 hours unless the cleanup cannot run (Privacy Policy, section 4), also after the account is deleted, so the email limits still apply. Cloudflare Turnstile, which checks that you are a person, processes your IP address and signals from your browser and device. Your email address is kept until you delete the account; an address never verified is deleted by a daily cleanup once it is 30 days old, unless a new verification link was requested in the last 24 hours. Details: Privacy Policy.

When you start filling in the form, Cloudflare Turnstile checks that you are a person. The button works once the check is done.