Different people will make different decisions. I'm not picking on mboromom24forWDW, but I'll use her why's as whys they don't work for us.
If our goal was to save money, we wouldn't go to WDW at all. Saving $50 or even $100 over the course of the trip isn't that big a deal in our overall expenses - if we saved that much - which given our habits would be questionable.
We do go for the restaurants - at least, restaurant meals are one of the Disney attractions I look forward to. Meals are an important part of our vacation. As such, we eat a big sit down meal once a day. We've done it other ways - and once upon a time I was happy with lots of counter service and maybe one or two "treat" meals, but I discovered that now (either due to my age or traveling with children, or the ability to afford it) I really want to sit down and enjoy a leisurely meal once a day or I get cranky. Chicken finger fatigue is part of it, but even the more exotic fast food offerings are lacking in their ability to provide me with an hour off my feet. Because we eat sit down for dinner, our counter service meals are light.
Unlike mboromom24forWDW, our family has been several times and will go again. We also travel in October. But knowing we will be back means no one feels guilty over taking an hour and a half to eat. And we've discovered that counter service doesn't necessarily save time - we've been in a 40 minute line at Pecos Bills and Tusker House to get food - yes, in October (I can't imagine trying to get food at one of these places in the summer). Both times we were running "late" on our schedule - we usually like to eat counter service as soon as they start serving when the crowds are light - not at noon.
We also do a lot of preplanning - having one PS a day. But counter service is more casual for us. We are DVC members and our home resort (BWVs) doesn't have good fast food - although B&C isn't far to walk to. My husband is a creature of habit and will walk halfway across the MK for Cosmic Rays, because he's been there before.
Diabetes runs in my family - so I watch our sugar and carb intake - particularly mine, but I try to teach the kids not to drink a lot of pop or eat a lot of french fries. Disney can be a difficult place to do this - and I don't need extra fries, onion rings, ice cream or brownies and an extra large soda - and I really don't need the temptation of it being "free." We bring our own water into the parks (paying for water has always bothered me - paying Disney prices particularly so). I have a horrible sweet tooth - my husband and I split dessert at our sit down meals to satisfy it without risking blood sugar.
I have my concerns about Connections/Hotwire - which I believe my state's Attorney General has a complaint against. The reputable broker recommended by Mousesavers has their vouchers for a lot more money ($17.50 vs. $11.50), making it much less likely we'd break even.
http://www.mousesavers.com/mealvouchers.html
The "deal" with the VKL vouchers is Rainforest Cafe. We eat there far too often here in the Twin Cities (Camp Snoopy and Rainforest Cafe trips are a regular treat for my kids when they've been good), so it isn't a restaurant we go to at Disney.