A similar method was used to uncover the name of a game mode in a teaser video from nintendo. Since it was a video the pixels would change as things moved and you could reverse the pixelation fairly well.
Funny they say bitcoins when 1 bitcoin was at least $1000 back then. I'm pretty sure the usual grammar rules apply so you can't use the plural unless you have at least 2 bitcoins. Super minor but interesting how a vastly deflated currency that is super divisible can mess with our usual language.
These kinds of mistakes show up constantly. Another one that often works is when people draw black bars over words they are often no 100% opaque and you can chuck them in to gimp, drag the levels around until the original word is exposed.