[@Scarifar] The time-skip mechanic changed:

[quote=From the OP]The higher a Hero's level, the more Khookies needed to level up. As there will undoubtedly be time-skips, it is important to know that Heroes naturally grow in power over time - which manifests in the form of a 'Timeskip Khookie Bonus'. Thus, after a time-skip, a hero will be granted extra khookies. The amount given will most likely be generic and apply to all, though GMs and Co-GMs may use their discretion if they believe plot demands that a certain hero be given more khookies.[/quote]

As we technically haven't had any time-skips, there have been no Timeskip Khookie Bonuses yet.