I've seen several comments about this just today. I find it funny that they're being congratulated on achieving this after 10 years of struggle, when there isn't a single original member in the line-up!
It looks like the current members have been in place since 2016 which makes them about as old as Blackpink. I don't think it's necessary to sympathize with them for a decade of hardship and all they have been through when it was some other girls who had five/six years of hardship and presumably still have nothing to show for it because they all got replaced.
I also don't think this is a 'viral moment and then goodbye' kind of deal. It's more likely Korean fans realizing thanks to that YouTube video that the current line-up is appealing, so they'll probably stick around now. Rollin is fun and catchy, but it's not that good. The story went viral first, then the song, and now the members (mainly smiley Yujeong). But this length of time for a group from a small company to get popular isn't all that strange, it just isn't usually achieved via fan video!