I just post my opinion, i saw the Advertlets Support leave a comments to me about the speed.
So I thing I need speak it clearly. I think Advertlets’s speed is fine, but some of my visit will come from China.
that is why some body said the speed is slow. you can see I only put 2 AD in my blog one is adsense and another is Advertlets.
before i put Advertlets’s code in my code, my blog’s speed is fine. but now it become slowly. so I said Advertlets make my website worse. Also if Advertlets support will see this post, i hope he could tell me how to get reference number? and anoter quantions is do you have any plan suppore paid by paypal