Fans always ask for bsides but never listen to them.

Some spotify metrics:

Twice's title tracks have 15x more listens than their bsides. Red velvet is known for great bsides, but their title tracks have 20x more listens. Gidle, NCT, Straykids, Ateez,OMG, seventeen, mamamoo. Almost all kpop groups have title-track to bside ratios that are very far from each other. In fact most of the time, the title track has more listens than all of the bsides combined. The only outliers to this are BTS and Blackpink with no skip albums, their fans actually listen to the bsides - and the proof is in the pudding. BP has an average ratio of 6:1, with bsides gaining a substantial amount of listens (their title tracks get a massive amount of listens so its impressive bsides can keep up). Albeit, BTS is an even crazier monster with albums with more songs and an even better ratio at 4:1.

If you're concerned with the group's growth. It is much better for them to release mini albums or perform single album comebacks. Kpop is about the whole package. We like comebacks not just because of the songs, but because of the new mv, outfits, hairstyles, choreo, dance challenge, dance practices, promotional variety appearances. Not just for the song. Groups will grow more if they focused on comebacks over full albums...