Off topic: I somehow get the impression that it is a bit easier to market .LRN than OpenACS, because people see exactly what .LRN does ...
... or what .LRN can do for them.
There is a marketing adage that its easier to market benefits than features.
And it's all a matter of perspective. A feature in OACS (intergrated permissioning datamodel) may be a benefit to the developer but still a feature to the business-minded.