They pay $250 CPA for the Starter packages that cost $50/mo. Double that to $500 CPA for referring sales of their CMS that costs $300/mo and Professional packages that start at $400/mo. Again, you can double that CPA to $1,000 for each enterprise customer you manage to send their way.
The HubSpot CMS is a tool or a system to create websites and landing pages and includes features like SEO and content strategy, A/B testing, calls-to-action, and live chat.
The Sales Hub includes e-mail tracking, e-mail sequences, live chat, e-mail scheduling, and more.
The Service Hub includes ticketing, live chat, conversational bots, e-mail templates, e-mail sequences, and more.
All of these 3 products start at $50/mo.
You could also send traffic to their free CRM tool and be paid if they purchase any of the other products within the generous 90-day cookie period.