I was playing monopoly a few months ago now, got the pink set and collected. the machine steps down the symbols and adds one per symbol on winline..... got to £8...... kept stepping got to £25 and kept stepping !!!! only gave £25 but it set off the streak 4 boards in a row went IM and then I took £12 off the accumalator thing in the middle and that repeated!! so for £5 in took £120...... so it does pay jackpot off features (but probably only once in a blue moon)....
chris