[tagawa]

It might help if you imagine yourself as the startup and them as your target market. What are their needs? Where's the pain? You suggest lead generation but maybe they have enough leads and the bottleneck lies somewhere else.

Don't be afraid to be honest and ask them directly, although not in a vague "how can I help" way. The more you research about their needs, the more confident you can be that you really are a good fit for them. If you produce some tangible results, hopefully they'll feel the same way.

I'm no expert but in my experience employers value what a candidate has done more than what they say they can do.