when you are extending any license or contract agreements it usually means that you will earn more from it than with previous deal, so apparently Spotify as rich company couldn't put proper offer on the table
Um, no? That's not at all how contracts work. A contract is an agreement between two parties, there's no obligation to increase any kind of deal for a second contract or sign for terms that are unfavorable. Many contracts for major companies get renewed routinely at the same rate. Ideally both sides come to an agreement, but in this case Kakao M took its ball and went home, probably because they didn't want to let spotify compete on a semi-even playing field with Melon, which they own. So the global deal expired and now KaKao are having to deal with international fans upset about the music loss (and artists announcing they're disappointed). They'll probably renew it eventually, I doubt Kakao anticipated how much this was going to blow up, especially if they're used to dealing exclusively with Melon.