Currently it is not possible to use instance variables on a data selection rule, if the table comes from an Ingest instance.
We use this a lot in TimeXtender Classic (with business units), to reduce data that has to be processed towards a Deliver instance. For example: only data from the last two years.
Would also be helpful if variables can be used in Ingest instance itself, see
Current workaround is that we hard-code most of them, which is not really what we want :)
