Is there a way to activate in-app purchasing on Words With Friends for the Kindle Fire? I have Words With Friends, version 6.7.1 that I downloaded from the Amazon app store on the device.  The version I have on my Android phone has in-app purchasing enabled, such that one can get the ads free version, etc.

After hunting around on the Kindle Fire version, I can't for the life of me figure out how to enable the in-app purchasing for removing the ads and getting statistics.  I have emailed Zynga at least 3 times inquiring about it, but I have never received a reply from them.

Does this feature exist in the Kindle Fire version?
No, there are currently no in-app purchases available (as of Feb. 11th 2014). If you read the reviews on Amazon, you're not the only one who'd like to pay to get an ad-free version, but it's not available.