None.
The RTK2go service is free to all users, and yes, you may use it for commercial purposes subject to the Terms of Use.
If you require dedicated hosting and monitoring services, please contact us below or see this link. We reserve the right to change this policy if required, but at the present time do not foresee any such need.
If you wish to purchase a copy of SNIP and run your own NTRIP Caster, SNIP is sold for a one-time fee (see general pricing). Unlike most commercial Casters, there is no further on-going cost. SNIP is not only the most popular Caster in the world, but combines a very low price point with a very rich feature set.
If you wish to support the RTK2go service,
Please consider making a donation to support the on-going operating costs.