If Discover has an agenda, it is not to subvert modern science but questions certain sacred cows.
No, their agenda is to evangelize Christianity through subversion of modern science. They admit it. Any actual science is only a small part, the rest revolves around non-scientific PR and government work. Don't forget, the Discovery Institute was part of the Kitzmiller case from the beginning, but tried to pull out once they saw they were going to lose.