As long as you keep in mind people are not follower numbers (difficult sometimes when spending too much time on the internet) it will be ok. As @KoreanTacos mentioned, keeping expectations too high may cause bitterness if not many, or no-one, participates. You choose to spend time crafting a comic, and they enjoy it, but there is no obligation from them to engage. Yet, you could be surprized!
Also, as @Kimoisempai said, prizes matter, but processes too. I suggest keeping the rules as simple as possible. The mindset of the reader is likely to be:
Is it worth spending the time it takes to read rules and follow them in orther to POSSIBLY get the prize?
Good luck and keep going