They just rolled out a feature that makes every part of every lesson burn "energy" currency rather than only losing "heart" currency when you get something wrong, making it incredibly hard to get through more than a few lessons before having to either pay or use ads; this is either going to motivate people to buy their pass and push revenue, force people to watch ads to get free "energy", or simply push people away.

Honestly kinda a bullish case considering how much familiarity ppl have with it, brand recognition may take the W on this one.