Low pay; Support.com pays very little, even to their management. Basically, you would not be working here for the money. You would probably be better paid working at McDonald's flipping burgers.
Work load is ever increasing, Comcast and Support.com constantly adding new procedures and tools to learn. The existence of your technical skills does not really play into this job as you are basically cannon fodder customer service. You follow software scripted troubleshooting guides, and anything above and beyond that is considered out of scope. Typically, reps will cold transfer customers to random departments in blatant work avoidance. This equals angry customers.
Support.com's Stock prices have fallen below $1 per share on the stock market, and has been there for quite a while.