You're kidding right? how in the world could it make them more dominant in the business because of one person holding up a sign? I've seen a segment with the crowd chanting TNA TNA, and that was years ago, and TNA didn't get any further since then really.
I could hold up a TNA sign at a WWE event and it wouldn't be making them any bigger, and I could hold up a WWE sign at TNA's tapings and WWE wouldn't be getting any bigger, besides, the only way Toronto needs a impact would have me thinking TNA would be the actual word "impact" not combining letters in a sentence, if I was to combine words in a sentence to create TNA, I'm pretty certain 70% of the signs held up at a WWE event could create the words TNA.
TNA may very well be starting to get a little bigger, but they are NOT a dominant force in the business, the WWE "machine" is the dominant force, looking at how WWE did just fine with TNA working Monday nights, only to move back with the excuse that they weren't trying to compete with WWE.
I wouldn't say that they're a doomed company although, they're doing decently thus far, and they'll most likely continue to do fine for quite a while, so as I said, I wouldn't call them doomed just yet, they may be doomed in the future, but they're not from the looks of it now.