Hi!!! Looks like you got the definitive word from the SW agent. Here on the Trans board, you're going to get a lot of 'discussion' as to whether it is ethical or moral to pay for one EBCI and then save seats for those that didn't pay.
I believe that if you need to save just one or two seats, then fine. But as soon as you start saving seats in a row other than yours, all bets are off. I also would head to the rear of the plane. Here's why. It just isn't fair to those that have paid for EBCI to have to bypass you and your saved seats (for those that didn't pay) and then have to go to the rear of the plane, while you and your saved seats get more preferable seats.
Here's the thing...if you pay for one EBCI and then board, ahead of your group, and sit down and save those seats for the others, and someone comes along and wants one of those seats? They are entitled to it! It is still an 'open' seat, and remains 'open' until someone's behind is plopped down in it!!! And if there is any 'discussion' about it, the FA won't get involved......an open seat is an open seat!!! Now, most people will move past those 'taken' seats, especially if they're flying with others. But, if you're saving seats toward the front of the plane (at least in front of the wing), and a solo passenger comes along and sees an aisle seat without someone in it? He/she may just plop down in it!!!
Be prepared. It may very well work out just fine. Or, you could face some unpleasantness.
Haven't seen you around for a bit!!!! Hope all is well with you.