Cost for some, Some don't know what they're missing, some don't need this type of suspension upgrades etc., a lot of people in the truck community simply want to lift the front to get rid of the rake or to accomodate bigger tires and they won't care how they get there. The higher they go for cheap the better type of mind set.
The demand for $2000 shocks is not exactly in full swing in this RAM particular market. Take the Tacoma market, or Chevrolet Colorado ZR2, on the full size 1/2 ton trucks take the Ford Raptor or or even the Toyota Tundra, look at all the options they have for suspension.. in the case of the Raptor and the ZR2 or the Taco/Tundra TRD they already come with a decent suspension setup but some buying those truck demand more performance so there are lot of performance options when it comes to shocks, hydro bumpstops, IBP Coilovers/shocks etc etc etc available to them to upgrade and they also have spacers available, but in their case they have people more into the hi performance options and they have more options in return.., compare that to the TRX truck so far already out there on the streets and you'll find the gap it exist betwen platforms.
TRX dudes are been offered top spacers after shelling out $90k + for their rigs i'm sure that will change with some time, but it's funny how the aftermarket reacts to demand... for example, a vehicle that is not even out on the street yet and they have a big page at Fox suspension and 3 different type of coilovers and that's just the introduction
even the Gladiator have now more suspension options that anything you ever seen for RAM's.
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Something to read on about the topic.
Pros and Cons of Strut Spacers There are pros and cons to each option, the biggest factor for people going with a spacer is perceived cost vs a new set of struts that may do the same. Spacers are also very popular amongst new truck owners who just want to level the vehicle without replacing...
www.shocksurplus.com