That's not true.

Set up an email price alert with skyscanner for a route that easyjet fly, and it's possible to see that their prices can go down as well as up.

(It's worth bearing in mind the easyjet price promise - they don't promote it these days but it still exists. Should you buy a flight and it subsequently goes down in price, then you can reclaim the difference as a credit voucher - this can only be done by telephone, and the credit voucher is only valid for 6 months, but nonetheless it could come in handy. All detailed in Article 26 of easyJet's terms & conditions.)

Regarding Daemon's question about whether there could be no availability on a desired flight - always possible I suppose, but highly unlikely three months out (worth checking the desired flight first though). I'd go for it.

Perhaps the primary purpose of the new 9.2.2.1 clause is to prevent people booking a cheaper flexi fare for imminent travel, i.e. within the next 24 hours. I guess it also functions as a way of creating a little uncertainty for those in position such as Daemon.