They say their charge is going to be about half of the Elsevier fee, but Elsevier's net profit margin is 19%. So basically they are saying they can be more effi

They say their charge is going to be about half of the Elsevier fee, but Elsevier's net profit margin is 19%. So basically they are saying they can be more efficient than Elsevier, but they're still going to have a fee to publish as open access.