For transparency, we're at an early stage and its much more useful for us to have more clients using and working with the software. Reporting bugs, telling us what they need etc... We're definitely open to negotiating on price, and we don't want it to be a blocker for people to use the platform.
That being said we still want to charge something to indicate a level of seriousness to the use.
For some context on how we arrived to the figure the ~1% figure is in the low end ballpark for how much we saw companies spend internally on their billing systems built in house, and its slightly higher but still in the same range as other billing providers.
Just my 2 cents - don't reduce the price. If someone isn't getting enough value out of it they likely aren't the right customer and might pull you all over the place with requests.
If someone is running $100m through your system they are going to call to negotiate anyway, you don't have to advertise it.
Though, I understand the apprehension behind having to pay 1% of the revenue. It is a psychological thing mostly (in a way, the potential costs seem bottomless like with card payments, even though 1% is actually a super-good deal for small tech shops).