Here are some reasons you may not be seeing your sign up form(s), as expected.
1. You signed up for the email sequence. Once a visitor signs up for the email sequence, they won't see the sequence sign up form for the same sequence again, using the same browser.
2. Closing out the sign up form. If closed out the sign up form will snooze, for 24 hours when your site or Folio viewed on the same device.
If you still do not see your form, and you didn't sign up or close the form out. Please email support@stickyemail.com with a link to your website and which sign up form you added.