A Question About the Licensing Conditions Listed in Patent Disclosures

Hello! I'm interested in the patent policy of W3C and writing this email to
ask a question about some licensing conditions listed in some patent
disclosures. According to the W3C patent policy, all participants in  a
Work Group must agree to the W3C RF licensing requirement. If a participant
does not agree to license a certain patent including essential claims under
W3C RF licensing requirement, it should provoke the exclusion mechanism to
exclude the essential claims. However, I found that some patent disclosures
listed in the W3C website contain statements as "Not excluded, but not
under Royalty-Free commitment". For example:
http://www.w3.org/2004/01/pp-impl/p76
http://www.w3.org/2004/01/pp-impl/p77
http://www.w3.org/2004/01/pp-impl/p83

Does this kind of statement mean that the participant does not want to
license the essential claims under the RF licensing condition as well as
not to exclude them? Is such option acceptable in accordance with the W3C
patent policy? Moreover, will a PAG be established concerning such
essential claims?

Yours sincerely,
Jeffery Wong