I'm not sure I understand what you're building. Is it a white label life insurance api to allow financial institutions to sell life insurance?
One way is to try to sell big enterprise contracts to big banks. This is really hard for startups to do, unless you have a product you know they really want, have deep connections or experience selling to banks, and have all the compliance and security requirements in place.
Another way to try this is to sell to smaller sites. They're more likely to adopt quickly, but you'll need to make sure that you maintain quality, are generating enough traffic and conversions to be worthwhile after the rev share, and don't devolve into something that appears scammy.
Do you know who actually wants what you are building? How have you figured that out?
Not only could big banks + financial institutions plug in our js to sell life insurance online (from quoting -> application -> signature & medical exam), but also smaller agents/agencies that do business locally could accept online apps. Currently, agents meet in person and/or have plenty of phone calls with a client to figure out what coverage they need and then they sell the policy.
With our product, agents can direct their clients to their website which will walk the consumer through the process.
The Stripe analogy makes sense because Stripe & PayPal make it so easy for companies to accept payments online via their HTML button/JS script, which is what we are trying to do here. They also (both cos) provide great dashboards to the consumer (an insurance agent/agency for us) to track their data (which is in the pipeline for us).