Personally i think it shameful that people intentionally circumvented the spirit of the sale.
I wouldn't be too hard on them, I personally have only been in 1 other of Jims sales, and was burned at the PayPal finish line too. Only to be told afterwards and openly discussed in the (now deleted) thread that the load up/ pay/ go back for other denom method was the only way you will get the chips you need.
I have not seen or heard anyone discuss this as a bad thing until now.
I wasn't trying to get any chips in this sale, but would probably have used that (now scorned) method.
Like Jim said, it wasn't really made clear either, but moving forward we will all have the knowledge that that method is no longer acceptable.