I don't know if you are aware that Red Hat provides Enterprise grade support for jBPM.
Red Hat Process Automation Manager is the product that contains among others the jBPM bits.
Red Hat has many customers using it.
Red Hat Process Automation Manager was adopted successfully by enterprises to improve the
performance speed of decision automation and to lower the overall cost of managing and automating
business processes. Even though customers had to replace out-of-the-box frameworks by rebuilding them
in RHPAM, customers were able to achieve significant cost benefits and use Red Hat as a standardized
approach to process automation across their enterprise.
Customers effectively began to systematically replace more expensive BPM and business rules offerings
with Red Hat and gained both performance and cost benefits as a result. The ROI was strongly positive, and
despite the need to extend RHPAM, the payback was 10 months on average for the customers interviewed.
These customers were from very large enterprises skilled in Java development.