Knowledge Exchange have today released a report highlighting the dependency on key non-commercial services in OA and the importance of ensuring their sustainability if the OA policies developed by institutions and research funders are to be successfully implemented.
DOAJ and SHERPA are named in the report as the two most important services in the OA community that require support from funders in order to operate sustainably in the long term.
Further information is available at Review of Open Access Policy Dependencies and the full report is available at http://repository.jisc.ac.uk/6269/10/final-KE-Report-V5.1-20JAN2016.pdf.
DOAJ News Service 
Congrats DOAJ and a key problem is addressed by the Knowledge exchange.