The platform is funded so that the large organisations needing advanced support pay for it, which keeps it free for the roughly 99% of users who do not. It is run as a digital public good rather than sold per seat.
Video: mWater Overview: Platform, Business Model, and Tutorial on YouTube
Procurement teams are right to ask what free means and what happens when it stops. For a government planning a decade of monitoring this is a sustainability question rather than a pricing one: it decides whether the system survives the next budget cycle, and whether costs appear later once the data is already inside. Understanding how the platform is paid for makes it possible to plan around it.