:::Yeah... hm. "In April 2008, Arutz 7 reported that the JIDF's reports had led to the closure of over 28 groups on Facebook; the JIDF itself claims the number has since increased to over 100." maybe? Or is that too wordy? I'd still prefer a more recent third-party source, obviously, but something akin to your "28 groups (though the JIDF claims over 100)" option may work until then. –