I guess this is one of those etudes where you learn a lot by trying, no one expects you to perform it. It's not even very interesting musically (even among Czerny etudes) (note that some from op 740 make decent recital pieces - Marc Andre Hamelin programmed one). It's an early opus, before 299, The School of Velocity. Plus it's an opus with one piece - rare for Czerny studies. I imagine he had an outspoken student that was bragging about his mastery of double notes, so Czerny wrote this to keep him quiet (and busy) for a while.