A couple things I noticed:

• No seat assignments until check-in Seats will be assigned by the system and cannot be changed.
• No guarantee of adjacent seats with companions

This seems to imply that no children (or accompanying adults) are allowed on this fare.

• Customers will board in the last boarding group (currently Group 5)...

Does this mean pre-boarding is not allowed for those with disabilities/lap-children? (Probably a real bad idea to get this fare anyway. Even more than for the rest of us.)