Looks great! I have little experience in this market, but regarding plans/pricing:
1. 5 projects seems like a lot of projects for a "Free" plan
2. Nothing differentiates "Basic" from "Pro" other than numbers. Google analytics and custom backgrounds / white labeling seem like "Pro" features to me.
3. Pro should cost more, and possibly just include "Unlimited" images (if someone actually ends up abusing this, that might be a good problem to have).