The We The People website claims that any petitions that collect at least 25,000 signatures in 30 days require an official response. Contrary to this claim, many petitions that do achieve the 25,000 signatures in 30 days threshold do not receive a response. Some of these petitions are unceremoniously deleted, while others are simply ignored.
(Hat tip to Reason commenter Mensan)
Source: We the People. Read full article. (link)