Community ManagerSorry its taken so long to get back to you, so we don't blog 3rd party products for MVPs and other select users. What we stipulate though is that the community can not be used to simply spam 3rd party links to the community and so for MVPs like yourself we would usually ask that if your recommending your own product to a community member that you tell them upfront that you are involved with the product (for transparency purposes) and that you only do so on threads that are relevant to that recommendation (so putting a link in every post you make wouldn't be welcomed).
That being said, their are some terms we have had to outright ban due to spam attacks or other activities that degrade the community experience and, for example, to my knowledge MergeTools addin is not one of these.
If you have any specific concerns then please do reach out but for now I am going to close this idea as 'completed' because we do allow MVPs to post about their own products on the MTC but we also have no intention of allowing the posting of 3rd party applications across the board.