now that the WUF also works on the web, I have a question about buying the chapters, as long as one is unlocked you can buy the others, but since it practically forces you to use the WUF in a chapter, one will never give you the option to buy.
In all the series that have WUF, will there always be a chapter with a timer that can never be bought, or when there is only one left, will it give you the option to buy it?