Late, but I only got into this series myself.Question: if you search for The Mech Touch you will find multiple sites with it, and only Webnovels seems to cost funbux. What's going on with that?
The short answer is Webnovel is the official publisher and those other sites are pirating them.
Webnovels funbux can be obtained free or bought with real money. Webnovels keeps track which funbux are bought with real money. When you spend the ones bought with real money, half of it minus transaction fees go to the author.
To be frank I have not spent a single cent on Webnovels because the whole set-up seems predatory (Webnovels own the publishing rights for all derivatives, for example, though they promise a 50-50 split), and if anyone knows if Exlor (author of The Mech Touch) has a Patreon or Kofi or Paypal account that I can send a few bucks at, let me know.