Hi Jordan,

An OTO is a one time offer....

It is set up like this

Buyer clicks order now button...they are then sent to the next page in your sequence which is a very special OTO at usually 20 to 30% of your initial offer and with something worth paying that much extra for.

As for ensuring your opt ins that again is simply done through using your auto responder code requiring your buyer to opt in then they get sent the opt in email with the confirmation link. Once they click the confirmation link they are sent a second email from your auto responder with the download link.

Hopefully this is not overwhelming...if you need something clarified I'd be happy to help you out.

Todd