What happens if a crowdsale doesn't sell out within 30 days?

What happens when a crowdsale doesn't sell out.

All of our crowdsales are initially set at 30 days. If the target amount of cells are not sold within 30 days we will extend the crowdsale up to a total of 90 days. If a crowdsale still hasn't sold out within 90 days, depending on how much is still left to sell, we may extend again or if it's clear the crowdsale won't be successful all funds will be returned to cell owners.