It's useful because you don't have to be at the place to plant a betty there, which is half of the difficulty in getting a betty kill and not being killed planting it.
to clear things up the three glitches are:
1.placing betty on teammates back
2.placing betty on c4
3.no gun glitch
the 1st one was found back in cod4 when ppl placed claymores on teammates heads to send them flying...
also used in WaW mostly on seelow....
the 2nd one you already know its old...
the 3rd one is referred to as the zombie walk in cod4 and in verruckt map same method is used to get multiple weapons...
what im trying to say is that ppl give you bad criticism because you post things that are old and you claim they are new... secondly stop being so rude to ppl who give you bad criticism... when you grow up youll learn why...
lastly -repping me was not necessary (that just means i will go into every post you post and find everything wrong with it...)