def think kaajak is a downgrade from derke. Fnatic boutta regret
APK buyouts are a bit high I think but it's probably still much cheaper to sign him over Derke in the long run.
Also because of how the system is, as a player the objectively best thing to do when you ascend is to leave to join another team. You're only guaranteed one year now and there's no point in taking that chance (even if you believe you're good enough to not get relegated) when you have an opportunity for a longer contract elsewhere