I'm going to be raising both of my tier prices soon. Pow (the non-comics content tier) will become $4, and Kaboom (the comics content tier) will become $8.
All of my old content will still be accessible by the old prices but at the beginning of October I'm going to be increasing the prices for future non-comic and comic content.
This is probably the highest I will charge for the non-comic and comic tiers. If I have a tier of a higher price than $8 in the future it will probably something where I offer a specialized reward like a sketch of some sort.