Virgin Atlantic is a transfer partner of Chase, American Express, and Citibank. So Virgin Atlantic miles are really easy to get. In general I don’t value their miles as much as many other currencies but there are strategic uses like 120,000 miles roundtrip for first class from the East Coast on their partner ANA.
Another strategic use is when they discount their own flights. Virgin adds fuel surcharges to awards, but when the mileage cost is low enough even that makes sense.