tbh I'd pay even for the first agent (perhaps a free trial would have sufficed), but the Hacker tier does make it a certainty I'll trial it.
Something most tool providers don't seem to get is that when I'm first building something I'm extremely price sensitive, but once I've got going I don't really care, like a tax if you take X% of my profit but you make my life easier and make it easier to grow that profit, who cares? That's fine compared to rinsing me when I'm not making any revenue (as with intercom). And if your product is any good, there's no way I'm going to switch once I get some traction, as the cost of any tool is ~ zero compared to the cost of employees.