Thanks for the solution description. it was informative but i had a couple of questions:

1. an oracle submits an account list which becomes part of the decentralized database so that real time validation of the user at the POR (point of reward) is done right? so there is no computing power being used and only database lookups?
2. assuming that the above point is correct, real time list distribution to all nodes (or atleast witness nodes) is a pain isn't it? it has to be part of a transaction otherwise we will not be able to track changes to the list?
3. if point 1 is not correct and Oracle will be part of the active transaction protocol. this means that user validity or correctness is a delegated lookup. i am assuming that this is not true as it will have a significant performance impact, isn't it?

Most oracles in the real world are real time rule based which means that simple account white listing is not adequate. E.g. A Medium might have a rule that says "if three experts curate an article, it is a damn good one". in this case an "expert" Oracle will do the identification upfront but the real time rule will not be implemented. Will SMT issuers then have to build a different App to extend this functionality?