If your goal is to get quick visibility from founders and CEOs of startups, then, advertising will be easiest way. LinkedIn will be the most important channel from advertising as well as community point of view.
Google Network ads can also help get a wider visibility and recognition. I also checked the website and I think value prop is not very clear. Unique thinking has been shown in case of pricing but I'm not sure how it will resonate with your audience. I guess you should consider testing this pricing with traditional structure to see response and make comparisons.
In case of long term branding, work with at least 70 of the points mentioned in this blog, https://www.upreports.com/blog/build-brand-identity-online-100-tips-ideas/
Cheers!