Porter Air transitioned to a revenue-based program earlier this week. There are now 3 status tiers (also spend based) and higher status earns bonus point on travel. The redemption rates are all over the place with no pattern I can discern in terms of what makes a flight likely to get a higher CPP on redemption. I even spotted cases where the same route/date/price had different redemption rates for miles. On the plus side, the new program actually seems to better reward the lower spending passenger more than the higher spending customers. That's a surprise for a revenue-based program launching these days. More details in the links above (which go to the analysis on my website).