Not a lot of type synergy within each paradox category, unlike Rapid Strike which had a lot of Water and Single Strike which had a lot of dark. Maybe we'll get Future Rainbow Energy and Ancient Rainbow Energy.
I'm not expecting it to be a Gamestop promo. When's the last time a Gamestop promo was actually a promo?
Genuinely asking, I haven't been playing or collecting that long.
Can't say I've ever had that problem, but then, I've only bought singles of the lowest rarity of a specific card, for playing. That said, the cost of the UPC is still far less than it would be on average buying booster packs (or in this case, booster bundles) until you get a specific SIR.