Long term revshare is better for any cam program, no matter if 20% or 30%, it adds up, many people reorder several times...you wouldn't want to miss a whale who spend a few thousand bucks
The average use will make you about the same money you get for PPS, sometimes a little less, but the big spenders make up for that...but don't expect too much the first week, it builds up slowly, but steadily.