From Forbes Magazine:
Though many of his fans may cringe at the thought, the late lead singer of Queen must be dancing in his grave now that his operatic rock has found a new home on theatrical stages around the world. Since opening in London's Dominion Theatre in 2002, the musical We Will Rock You has been filling theaters in Australia, Spain and Russia. In September the show opened at the Paris Las Vegas hotel, which helped boost global tickets sales to more than $1 million a week. Mercury's estate, headed by longtime friend Mary Austin, keeps an estimated 1.5% of the box-office receipts.
This translates into $15,000 per week, probably a lot more if you're exec producers like Brian and Roger.
I think the point was clear in the article. If it's a million in ticket revenues, Freddie's estate gets 1.5% of that million. Costs on the million may be $900,000 per week and if that's a profit of $100,000 there you go. And of course it's an American mag who probably know nothing about Freddie's creamtion and couldn't be bothered to research.