I'm not sure I followed your post but that doesn't mean it isn't right. Basically it's just a financing deal - the banks hedge their end of the contract so they aren't taking any directional risk. That could mean balancing a portion of it with other market participants that want to put the opposite TRS on (unlikely in the case of Fairfax stock but quite likely for other assets) or, as in this case, just buying the shares to offset the directional risk completely. The fees and interest rate are where the bank makes money. They are the bookie, not a fellow gambler. The counterparty also gets the dividend, which is factored in to what they charge FFH. There is a cost to Fairfax to keep the trade going.
But when the contracts are terminated - the hedge shares become available to either hit the market for sale, or as is more likely here, get bought up by indexers and closet indexers when Fairfax gets added to the S&P / TSX 60 index.