Simply use a 5 digit code (called the survey validation code) that is a multiple of 3 for free Regular Chips and Regular Drink.
Basically this works exactly the same as the Pizza Hut hack that Rowjo posted a while ago, so technically you are meant to have your receipt from last purchase but in my experience (just like Pizza Hut) they never ask for it.
So for example i go through Drive Thru, order at least $5 worth of food, tell them i have a survey code (any 5 digit number that is divisible by 3), and get free drink and chips with my order.
Here is the best way to figure out a code to use.
think of a 5 digit random number less than 33333, then multiply by 3, and there you have a shiny new survey code.
Eg. 25678 x 3 = 77034
eg. 16330 x 3 = 48990
eg. 30088 x 3 = 90264
I think you can even times a number like 1 x 3 so your survey code would then be 00003. But havent tried.
Hi I have a survey code,
-Sir, can you tell us the code?
Sure, its 77034
-I'm sorry sir that is incorrect.
Hmm, okay let me try again, 48990
-That, sir, is also incorrect.
Ok okay, one more, 90264?
-Thank you sir for participating in our survey. Please enjoy a free regular chips and drink.
^ people aren't robots, they will figure out we're just making shit up.
Where as Pizzahut has a website, you can do this non stop and they won't care.