When are the Sanrio and Yu-gi-oh Happy Meal Toys Ending?

The Sanrio and Yu-gi-oh! collaboration is ending soon

Go to your nearest McDonald's now if you are planning to collect all of the Sanrio x Yu-gi-oh! plush toys. It seems like the promotion will be ending soon on September 16th. My friend and I were talking about the end date just the other day. Seems like it was just yesterday when this promotion started. I'm bummed because I really wanted Cinnamoroll x Blue Eyes. However, after eating about 5 Happy Meals I've decided to just give up. There are only so many cheeseburgers and chicken nuggets I can stomach. 

I've noticed that when I order 2 Happy Meals simultaneously, I generally get the same toy. I wonder if this was always the case. I remember when I was a kid, when we ordered two Happy Meals, we generally had a chance of getting two different toys.  You used to be able to ask employees to trade your toy if you wanted, I wonder if that is still the case (I haven't bothered to ask). My theory is that if a toy is popular, there are generally no toys left over so they throw it in a toy bin mixed in with a new box of toys. Now if a toy is popular, there wouldn't be any leftover toys from the previous days and you're given the same toy for multiple Happy Meals. What do you think? Does your McDonald's give you different toys or the same toy if you buy multiple Happy Meals? 

Below is the collection of Happy Meal toys I've collected throughout this McDonald's Happy Meal promotion: 

Three freaking Kuribohs, 1 Obelisk, 1 Dark Magician, and 1 Time Wizard

Did you give up trying to collect them all? Do you have all of them already? Let me know in the comment section down below.