May I pick your brain for a few minutes? Please? It’s about a calendar site and ads

Hello!
Thank you for your time, I'd like to brainstorm with you around my original idea, which we could all benefit from, there's no patent on it
I made a calendar site, which shows a calendar of any month and year you want. You can also download a free pdf calendar of any month for printing.
So, my idea is to sell ads directly in the calendar, for instance on day 5 cell of the calendar grid there will be one ad, on day 17 another, etc.
What I'd like to brainstorm on is what could be…
May I pick your brain for a few minutes? Please? It's about a calendar site and ads

See original post by JamesColin