Re: Loose slot machines and spotting them at online casinos?
Well there's no way to be certain however I found a good site a while back that provides some information regarding the decoding of slots (ie. reverse engineering of the games) themselves which in turn translates into them being able to give fairly accurate numbers as to what the payouts are for particular games.
If you visit this site you'll see what I mean: slotbeaters.com
Hope this helps,