Symbolicons alternatives

Guys, I wish you good luck! I like your introducing video, it's very clear + easy way for understanding what your product offers. I am not a designer and sometimes if I need some promo, I am tired of searching it in internet and setting it according my article. I like this tool because it can make things easier. But I hove a question: if I have personal promo, can I upload them and customize them, not pictures from your fits? Also, what is your monetization model?