In Kpop, a successful tour needs success on streaming first.
This is not heavy metal that is consumed in an entirely different way.
Kpop groups get buzz when they do well on streaming. Even on just this forum: people creating threads about streaming numbers, create buzz around a group. Big accounts on other social medias, tend to post when a Kpop group does something chart wise, which means the group's name gets out there beyond the fans they already have, each time they do something streaming wise.
It doesn't always have to be 'they got a billion streams'. There are accounts dedicated to posting about streaming numbers even when groups get a lot fewer streams.
People are more inclined to consume a brand (any kind of brand) when they have heard the name before, which is why adverstisers spend so much money globally on getting brand names out.
It's the same for Kpop. If people/big accounts would start posting as much about Craxy as they do about the top groups, people will be more inclined to check them out.
One group that helps a lot with this is multis. They are often looked down on by hardcore fans of groups, but they do a lot for popularizing many groups and getting group names out there, as they are open to listening to new groups. A lot of the midtier and even upper nugu tier groups get some buzz and streams because of them.
Only when a name is out there, songs will be played and touring can even be considered.