So, they're tracking you (they're tracking everybody)... but they don't want you to know.
The agreement, uncovered by the Electronic Frontier Foundation, states: You shall not create, publish, distribute, or permit any written, electronically transmitted or other form of publicity material that makes reference to LEARN or this Agreement without first submitting the material to LEARN-NVLS and receiving written consent from LEARN-NVLS. This prohibition is specifically intended to prohibit users from cooperating with any media outlet to bring attention to LEARN or LEARN-NVLS. Breach this provision may result in LEARN-NVLS immediately termination of this Agreement upon notice to you."
...Immediately after WIRED published the story, though, the agreement mysteriously changed. The secrecy provision is still there, but the statement that it's "specifically intended" to prevent the media attention has vanished.