And all of our lives were enriched from this discussion, on a thing that totally matters in this context at all, whether or not the colloquial use of the word “infinite” in a context that literally everyone understands is technically correct or not. F.DS at its absolute finest.
Well the thread title asks for the maximum possible VP, so it seems directly relevant whether the answer is ∞ or "there is no maximum possible number of VP".
Except the post that you were disputing did not claim it was possible to gain an infinite number of VP. Only that it was possible to “go infinite”, which most(?) seem to have no problem understanding as “it’s unbounded by the rules of Dominion, and only bounded by the time it would take to physically play out and the heat death of the universe”.
I highly doubt the OP cares about whether we are using “infinite” in a strict mathematical sense or a colloquial one, nor does it matter in the slightest whether the answer is no maximum or infinite VP. At least not to this mathematician.