Actually FNM left a bad feeling in my mouth, so maybe I won't be playing magic anymore.
I was slowly building a budget red deck that didn't use any token cards or token enablers, since I knew the token cards like Goblin Rabblemaster and Mana Confluence were expensive. So I was specifically picking out a strategy that would be mutually exclusive with that: Using Abbot of Keral Keep and Mardu Scout instead of Dragon Fodder and Atarka's Command, and Exquisite Firecraft instead of Goblin Rabblemaster. I was having an easy time trading for the cards I needed 1 or 2 at a time each week at FNM, in between games, trading away strong rares from other colors.
But then this past weekend, a deck using Abbot of Keral Keep and Exquisite Firecraft won the pro tour, so the price of those cards shot up. I already had the Abbots, but just needed one or two more Firecrafts for my deck to be cohesive. It's not just that the Firecrafts are expensive now, I have lots of black, blue, green, and white cards with real value in my binder. It's that no one has them available now, they traded them immediately to friends who were building copycat decks.
tl;dr, even when I was trying as hard as possible to build the cheapest quasicompetitive deck I could, meta shifts made it less cheap. Which might mean I'm a good deckbuilder for designing something with some similarity to what won the Pro Tour, but all I get for that is a kick in the butt.
I would really wish one of those LCGs would take off, like Netrunner. I like everything about Netrunner except for all the mechanics of the actual game, which is kind of an issue.