I know I've read on here about folks combining many small
Walmart gift cards into one when buying Disney gift cards as Sam's Club. I think most say they do this at the customer service counter, but I'm guessing this is more useful at Sam's than Walmart. Based on my experience last night, at Walmart save yourself some trouble just grab a WM gift card and head to self checkout to buy it with your GC's.
I was trying to use my AmEx offer for $15 off a $30 SamsClub.com purchase last night but I had 5 swagbucks gift cards I've been saving up for it. Only 4 are allowed for online orders, so my plan was to hit Walmart to combine them first. I head to customer service, there's only one lady in line in front of me and she has an easy return so I'm up quick. I ask the CSR if she can combine my 5 gift cards into one and she's not sure. She calls for the manager, but instead of just asking over the walkie or asking the manager to call, she just says she needs assistance. Well the manager is cleaning up a spill so it'll be a few minutes. After waiting close to 10 minutes the manager arrives and I ask her the same question. She responds "there's no way to combine them, they're all different numbers"

I don't really find much use for the term dumbfounded anymore and yet that's exactly what I was for a few seconds. Just really did not know how to respond to that. Then I ask "well can you just use these to pay for a new gift card?" and she said "we're really not supposed to do that"

so basically that means it works they just won't do it, gotcha.
So I take my leave and my plan was to hit another WM to avoid issues and just go through self checkout but I forgot I wasn't heading in that direction. After my other errand, about 20 minutes later I went back in, found a gift card, self checkout was practically empty, entered $110 then scanned all 5 gift cards to pay for it easy peasy. Took like 2 minutes, I'm pretty sure it was longer getting in and out of the parking lot.
Something else I learned last night is you have to select how much money from each form of payment on SamsClub.com; it doesn't automatically take all the money off the gift card. I knew it would do it for multiple CC's just didn't realize it did it for GC's too. That's a nice feature, if I had known that I would have put all my little gift cards on the same one. But all said and done I bought the $150 Disney GC pack for free

I had $110 in swagbucks money, I'll have $15 statement credit on my AmEx, and $20 from Bing rewards cashed out to PayPal will cover the $17.98. (I already miss that option

)