Can't post in XDA forums with Tapatalk?

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http://androidforums.com – I can't use Tapatalk to post or reply in the XDA developer forums. I can post in the forums with a PC, but not with Tapatalk. I noticed XDA sells their own forum app in the Play store. did XDA disable post/reply in Tapatalk so people have to buy their app to use their forums??? (General)