It's a good thought but I think adding this kind of complexity , even with good intent, is exactly the sort of thing the 70/30 split was created to avoid.<p>There is something nice about just knowing, this is my split. I don't have to worry about it switching and my profit formulas being altered once I hit a certain sales threshold, My take is $.70x, with x being downloads. Period.<p>Beyond that, I'd have to ask what happens when we take this to its logical conclusion:<p>Say you start with an 85% split for the first 10,000 sales or something -- what happens if the split then eventually goes below 70/30, say 65/35 or 60/40 or worse, the more copies you sell? How do people react then.<p>I suppose the counter-argument is that that's how the tax system works -- and that's fair -- but I still don't see developers being happy to have to give up more of their take down the road, just because they have reached "success."<p>I mean, if you're going to go to tiers, then the next argument becomes about what defines one tier from the next.<p>Again, it introduces all kinds of complexities that having a straight 70/30 system avoids. And to me, that simplicity ultimately trumps the other arguments, as sympathetic to indie developers as I might be.