Hard no for me. I've been playing probably an average of 3 days every 4 as an individual player with a gold deck for about 9 months and a strong silver deck for about a year before that, and I haven't even got enough BCX to max out any over printed reward cards, one or two I've come close, but they're mostly at around Gold level, like 50 - 150 BCX for commons, a couple of legendaries with 5 or 6 BCX. What I'm saying is therefore that probably the only people who have leftover BCX to benefit from this will be whales who already sucked all the value out of the the game and now they'll get another way to do so.