Earlier quoted context omitted.
Existing, old school carpool programs don't check to see if drivers have insurance, so how is this anything new?
Existing, old school carpool programs aren't paying their drivers, either. Which means it isn't commercial use. Which means your regular auto insurance covers it. Unlike this.
From the TOS:
"...we may charge you to reimburse the Carpool Driver for the costs associated with a Carpool Ride provided to you. [...] Reimbursements may include per mile charges at up to the prevailing IRS standard mileage rate, and other expenses like tolls and parking fees." (Emphasis mine)