If Keith were so inclined, he would certainly repeat himself:
We have no plans to assign processing on an ad hoc basis; this has been done by others, and the feedback is that most engineers hate it. I guess because at the point they want to do one more thing, they find they’ve run out. (source)
… even though A&H does something similar, for example, in the case of de-essers, which you can only use a maximum of 8 times in SQ-.
I am certain that if they truly wanted to implement something like this, they would have found a solution for it.
And in the case of a paid expander upgrade, it would even cost only about one-fifth as much if you only had to pay for 10 instances instead of 48.
That way, the price wouldn’t be driven up unnecessarily. 