It's pretty cool to see how many users in a particular area are using Wi-Fi, but if they've transfered 13TB of data already, the network must be holding up.
32 TB over 100,000 people isn't that much. I download over 1 TB a month sometimes on my residential connection
And what happens when the ISPs start using caps? Your profligate downloading will start costing you real money.
And will people be willing to offer bandwidth to strangers if it will push them over the caps and cost them extra money? That is the potential weakness in this Meraki network.
P.S. Sharing the bandwidth is legal because Meraki only deals with people whose ISP allows sharing:
Is this legal?
Absolutely! Free the Net works with service providers that allow the sharing of broadband access.