I think the idea that these various systems (RPS, HA, scenarios) "cost them paying customers" is somewhat faulty logic. The assumption is always that because someone (usually the poster)

left the sim due to dissatisfaction, that therefore "many" customers left due to that same thing.
But that's only HALF the story, isn't it? What about all the customers who STAYED BECAUSE of the introduction of the RPS, or HA, or whatever? No one knows how many customers would have grown bored with the old MA system and left if the RPS or HA had not been introduced. There are certainly MANY folks who stick around at WB ONLY for the Scenario Lites and S3 (300 online routinely for an S3) events. I only know that I was pretty fed up with the MA, and the fact that it's still the basic setup over here is not a selling point for me.
I think about all you can say is that the so-called "hard core" sim community is now pretty well split into "war re-enacters" at WB and "gladiator pilots" (no slight intended)

at AH. To be sure, there are a FEW re-enactors at AH and a few gladiators at WB, and a few who are driven mainly by cost, but IMO the players have pretty much migrated into the sim that gives them the "gameplay style" that they prefer. The guys still at WB don't CARE that they face a 109 every day in their Spitfire. If they want to face a Spitfire, they'll fly the 109! The guys in AH don't CARE that there's no Hurricane, because they want to see who the best Dora pilot is. Or to see if they can defeat a Dora in a N1K.
Sort of sad and good at the same time. Nice that we all have someplace to go, but sad that the two sims are now essentially reduced to fighting over the same small group of players for revenue, using basically the same reactionary ideas in hopes of raiding the other guy's customer base. Will HTC create an HA to hold on to the "re-enacters," or risk losing them to iEN's WB3 "strat system?" Will iEN add halftracks and tanks (Oops, they already did...sorta) to show they're not "stagnating," or risk losing customers to HTC's "new toys every month" development pace?
And will either of them actually think outside the box and do something NEW, or will they just wait to be "scooped" by WW2OL, diluting the hard core sim community even further???
--jedi