This is a great first step. But for this to really make a difference to the current traditional publishers - every researcher would need to follow this exampl

This is a great first step. But for this to really make a difference to the current traditional publishers - every researcher would need to follow this example. The other problem is access to all the previously published papers. So my question is : Who owns the copyright to a paper published in a major academic journal? Is it the original authors / researchers? One would think so since they are the authors. Or do they grant exclusive rights to the journals. If the authors own the copyrights, what is to stop them from uploading their papers to one of these Open access sites?