In June 2010, ASCAP sent letters to its members soliciting donations to fight entities that support weaker copyright restrictions, such as Public Knowledge, the Electronic Frontier Foundation, and Creative Commons, creating notable controversy as many argued that these licences are a form of copyright and offer the artist an extra choice. Lawrence Lessig, a co-founder of Creative Commons, responded stating that they are not aiming to undermine copyright, and invited ASCAP for a public debate. The offer was turned down by ASCAP's Paul Williams.