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Anti-spam setting. Requires non-signed-in users to complete a captcha before adding or editing cards (where permitted).

All captcha rules that apply to

all cards
*all+*captcha
yes
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fullscreen modal
edit edit
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cards of a given type
Sign up+*type+*captcha
yes
more_vert
open_in_new page
fullscreen modal
edit edit
space_dashboard advanced