"advanced slot tactic" that Prax from the GWAE podcast may have been referring to

[tableplay]

He mentioned a fear of bed bugs lol. I figured if he was running mail all over the place would have to be very mobile to pick up everything during the pickup dates especially if he was doing it over a large area.

I think you and Prozema's guess is a good one - and, if the guess is correct, then what threw me is that Prax classifies it as an advanced slot tactic rather than an ABC move (I don't recall him mentioning it as an ABC move or mentioning it even at all).

Yeah, he was incredibly vague. That's appropriate imho.

Yes, it's fine by me. He can classify it the way he wants and for whatever reason (discretion in this case) of course.