The Heritage Foundation hasn't just barred Ryan Sager from their events; they have also recently snubbed Bruce Bartlett. He writes:
The Heritage event to which I was uninvited due to my criticism of Bush's policies was not some ordinary one of the type Heritage hosts every day. It was specifically to commemorate the 25th anniversary of the 1981 tax cut. As far as I am aware, every major living figure involved in the enactment of this legislation was invited except me. I seriously doubt that any are paying contributors to the Heritage Foundation.
The organization knows full well about my involvement in the 1981 tax cut because I was a senior fellow at Heritage for three years back in the 1980s before leaving to work for Ronald Reagan in the White House. I was, in fact, the staff person on Jack Kemp's congressional staff who drafted the original Kemp-Roth tax cut, upon which the Reagan bill was based, back in 1977. Many others also contributed. Some of those invited to the Heritage event did not. People can draw their own conclusions about these facts.