It's been 25 years since I've used or seen a blooper in use. They are (were) used in conjunction with a spinnaker; when sailing dead downwind. Consequently, it is a very challenging sail combination to keep full, drawing and heading in the right direstion. It takes a fairly skilled person at the helm. It is not a practical sail. A good sailmaker could likely, recut it to make a drifter; or perhaps a cockpit cover.