Some people, myself included, strongly prefer beers on draft. This goes especially for hoppy beers. I just love the way they pop. Plus, it's still a good price vs glasses of draft. You'd be lucky to find a sub-$6 pint of Sucks round these parts. Of course, fills are probably in the $18 and up range around here, too. If a place was selling, say growlers and sixers of GL Dortmunder Gold with the same kind of pricing differential, it wouldn't make much sense to get for me personally to get the growler. In general, I usually only get growlers of draft-only stuff. ~90% of the fills I get are from local brewpubs and I don't get them very often. Usually just for tastings or parties.