If Easyjet Switzerland uses the same Terms & Conditions and modus operandi as Easyjet UK, then basically the statement above is a joke. Because
a) Mid-Week flights are cheapest on Easyjet anyway
b) there are no minimum stays or any other conditions at all on Easyjet.
So "convenient" terms & conditions of 2 night minimum stay and a maximum stay of 10 days.... pah!
Besides, if you book Easyjet 1 day before departure then that's your own fault... and the Swiss Easy Fares are only available 14-28 days prior to flight, so I don't see your point...
Well, Swiss is just doing the same as BA and LH - offering some empty capacity at lower fares.
Wonder what's happen if LH introduced a set of offers called "Ryan Fares"
- or maybe a slogan like "Reihenweise kleine Preise" - which sounds a lot like Ryan....