At most, this shows only that TBN and the televangelists they air are all about the money, but I will leave that issue to the side for the moment. To settle the matter, all that is necessary is an examination of the life of Christ; if he was not all about the money, then any deviation from that is one that cannot legitimately be laid at the feet of Christianity as such.
In terms of how Jesus conducted himself, we find him uttering the following statement in the Gospel of Matthew: "The foxes have holes and the birds of the air have nests, but the Son of Man has nowhere to lay His head" (8:20). There is no indication that he led a life marked by material wealth, or encouraged his followers to do so. In fact, James 2:5 tells us that God chose the poor of the world to be rich in faith.
All this is not to say, of course, that there is anything inherently wrong with material prosperity, it is only to emphasize that it has no necessary connection with Christianity.
You may also be interested in reading Answering Questions About Televangelists.