That's good feedback on our pricing, thanks for that. One thing I'll clarify is that this is just for customers with whom you sign contracts. If you have self serve customers that do click through agreements, we don't charge you for them.
A common pattern we see among our users is that they have a high volume of low priced customers on their self serve plans, and then a smaller number of high dollar customers on something like an enterprise plan. These enterprise customers are the ones where you need to sign contracts and have negotiations. That's more the case where our software is helping, and it's only these that we charge for.
And yes, you're always welcome to use the open source docs for free if the software doesn't make sense for you.