ASRP is for user generated content (UGC) that is entered in the publish environment. The fact that ASRP is a shared store allows the UGC to be visible in the author environment.
Assets is focused on authoring and Asset workflows only run on author OOTB.
Currently, there is no way to find these in a scalable way after the UGC is stored in Adobe Social. You would need to implement code to feed them into Assets (store in JCR) as they come in. However, the impact on performance would likely be significant, especially if you run the Asset workflows on them.
- JK