What additional revenue streams would you add to a B2B SaaS marketplace?

I work at a growing startup that runs a B2B software marketplace, and I’m involved on the vendor side. Right now, we monetize through premium vendor accounts, review campaigns, PPC/CPC campaigns, and content partnerships.

Most of our current products help vendors with visibility, traffic, and lead generation. I’m trying to think about what we could add that would create more value further down the funnel, especially around sales and pipeline.

A few ideas I’ve been considering are buyer intent data, qualified lead packages, competitor insights, account based marketing support, lead nurturing, category benchmarking, and sales enablement services.

For people working in SaaS sales, what would you actually pay a marketplace for if it helped your team generate or close more pipeline? I’m especially interested in recurring services, not just one off campaigns.