Many travelers know that Spirit recently began charging $10 for a 2nd checked bag and $100 for a 3rd one. Well now, starting June 20, you will have to pay to check any luggage. $10 per checked bag if you do it at the airport but "only" $5 if arranged in advance online. Spirit's version of first class, Spirit Plus, will change to Premium Economy class of service, whatever that is, but will be called the creatively named "Big Front Seat." No more free booze for those paying double or more than those in Coach. Spirit has had a profitable system for quite a while but must not have heard the "If it's not broke, don't fix it" old saying.