He now makes a risk-free 30%, while the bot-users risk their funds.
Well, he only gets commission if the users actually make a (monthly) profit... if it's a loss, he gets nothing. So, theoretically at least, it is in the bot creators best interests to make sure that the bot works and generates profits.
The pricing model suggests that he expects short-term profitable periods that he can extract rent from, but that he isn't confident about long term profitability. If the bot were consistently profitable, he wouldn't want to give away 70% of the profits by licensing it out. He could get rich by compounding gains instead.