Bots may buy services at any time on their turn. When buying from the Riverfolks bot, they may buy any number of services. (Follow the normal limit for a Riverfolk human.)
Bots must be able to afford the services, and they will not buy services if they have fewer points than the Riverfolks huan or bot.
The service cost depends on the bot's score: 0-9VP=2 / 10-19VP=3 / 20+VP=4