Oh please... stick a sock in it....

Nothing will outright 'void your warranty' and no one has said that here. What we've said is that you do have bearing/sprocket, etc. related issues that BRP *could* decide not to cover that damage under warranty using the after-market hitch as an excuse. It's a valid concern especially considering some have had bearing and sprocket issues out here.. with and without hitches installed.
If Lamonster Garage, as good as his stuff is, sold a hitch I'd still learn towards the BRP one for the same reasons. This is also probably why he hasn't (and probably won't) release one... the liability would be too great.. if there was a failure things could be catastrophic.... not really the case with aftermarket headlights, pegs, etc....
The Bushtec is a great setup, but ugly as sin.
If someone is hooking to the swingarm, I think the best option is the BRP one. The others I've seen simply are not made as well and may put undo stress in the wrong area. BRP's swingarm hitch was a bit controversial when it came out as many of us felt hooking onto the swingarm was a bad idea. They've proven it can be done and work well.