When you download close to 200GB, you need to put back more than 4GB. General overheads will take up most of that.
I realise not everyone can do 1:1, but 50:1 is an outrageous value and there is no excuse for it.
A lot of people still use private trackers because you get good seeders on them. One of the places I know has a rolling ratio, the more you download the better your ratio needs to be, so that way even the most obscure item is still available at decent speed.
Of course it could all be legal downloads (like iPlayer), in which case it isn't an issue as there is nothing to return, but I'd put a wager on where most of that bandwidth was spent and that makes it selfish Internet use.