Great job on the Case Study! My advice at first glance would be to make it shorter and less textual, with emphasis on your numbers, what the audience is saying, awards and accolades, etc. Also if you have social influencers involved with the series, with a high number of followers, include that in there…include a page (if you haven’t already, as I reviewed quickly) on what’s in it for the sponsors and what they’re getting out of it.
I’m currently trying to track down sponsors for a cruise web series and it’s certainly not easy. I’ve created a one page sales sheet with advertising/sponsorship rates, to see if we can get fees per episode in exchange for shout outs and included viewership numbers, quotes from viewers, FB/YouTube engagement, etc. I think it’s always a good idea to keep open in-kind sponsorship as an option. That seems to help with the response rate.
For my own series I went the crowdfunding and self-financing route, but because of how exhausting and risky that is for the future I am sticking with grants, hooking up with existing production companies or finding sponsors.