After talking with players from around the world who have downloaded the app, here are the three major rules variations I have seen. I have included a screen shot of a hand below to illustrate the differences between the scoring systems. I will do one scoring system each day.
Ryan's top line results: loses1 pt to each of the other two players for a total of -2 pts. Ryan's middle line results: loses 1 pt to Martin, but wins 1 pt from from John for a net of 0 pts. Ryan's bottom line results: loses 1 pt to each player for a total of -2 pts. Ryan's line scoring is a net -4 pts.
John's top line results: wins 1 pt from each player for a total of 2 pts. John's middle line results: loses 1 pt to each player for a net of -2 pts. John's bottom line points: loses 1 pt to Martin but wins 1 pt from Ryan for a net 0 pts. John's net line scoring is 0 pts.
Next is scoop points: Martin scooped Ryan, so Martin is +3 pts and Ryan is -3 pts. John was not scooped and didn't scoop anyone.
Finally royalty points: Martin has a full house in the bottom hand. Since the scoring is highest royalty only, the other players royalties do not count against Martin, so he is +6 pts from each player on the bottom line royalties. Total of 12 pts in bottom line royalties.
John has a flush against Ryan, so John would get 4 royalty points from Ryan for his flush. So John loses 6 pts to Martin, but wins 2 pts from Ryan for a net of -2 in bottom line royalties.
Ryan loses 6 pts to Martin's full house and 4 pts to john's flush for a total loss of 10 pts in bottom line royalties.
Martin also has a straight in the middle for another 4 pts from each player for middle royalty points for a total of 8 middle royalty pts.
There are no top line royalties this hand.
So our totals are:
Martin: lines 4 pts, scoop 3 pts, bottom royalties 12 pts, middle royalties 8 pts. Total of 27 pts
Ryan: lines -4 pts, scoop -3 pts, bottom royalties -10 pts, middle royalties -4 pts. Total of -21 pts
John: lines 0 pts, scoop 0 pts, bottom royalties -2 pts, middle royalties -4 pts. Total of -6 pts