Comcast: "Starting today, new and existing customers can take advantage of the following speed increases:
Connect: 75 Mbps to 150 Mbps,
Connect More: 200 Mbps to 300 Mbps,
Fast: 400 Mbps to 500 Mbps,
Xfinity Prepaid: 50 Mbps to 200 Mbps"
https://corporate.comcast.com/press/releases/comcast-boosts-speeds-xfinity-internet-customers
Data caps on any fixed location internet service should be illegal.
Overselling then blocking customers from being able to use what they paid for is fraud.