https://imslpforums.org/viewtopic.php?t=8187
Dec 30, 2015 · One needs only to look at Wikipedia, which maintains open access, yet still finds sufficient revenue to sustain their enormously (and wastefully, at times) high costs. ... Are there any tax form 990s filed under imslp.org's name? So far, I can only dig up the fact that imslp.org is owned by a private company, Project Petrucci LLC. ...