Hi Kasey, This is something that can be done without EXISTS. In the
unsupported version of the API Explorer, you’ll find a project-level
collection called Subscribes, within which you’ll find a Subscriber ID
field. That’s what is referenced in the text mode below. Things found in
the unsupported version of the API are safe to use and reference, but
they are subject to change or removal. For now, this one seems to work
well. Below is the text mode for a filter on a project report. You can
add the...