Liking an openingspost (OP) / comment always costs you 10ct…

Liking an openingspost (OP) / comment always costs you 10ct.
But, when your OP is liked you get 9ct and when your comment is liked you get 4.5ct.

@Twetchapp , correct? If so, why the difference?
Moreover where does the 10% & 55% go to?
55% is a lot imo.