Revert "Revert @ednapirahna's newsletter stuff"

This reverts commit e1fde8967bbe195b66c6fd97fe258c89f73a50b5.
Revert "Remove @ednapirahna's newsletter_form"

This reverts commit ac817d82c29028034d714ac95b9f7f2204ded42a.
fix typo in "Notify me the next time ..." label