Here are some points on why Comcast is doing so poorly these days.

• Due to an undefined bandwidth cap, many users have been banned for a year.
• Use of throttling on P2P traffic.
• Increased monthly costs, yet no increase in bandwidth speeds.
• Tech support is rude and not helpful.
• They banned me without proper notice! I documented my experience here, here and here.

Update: I just noticed that their stock was recently at a 52 week low. Who would have guessed?