Conversation so far:
Did something go wrong with communicating with the Spirit rover?
Communication with Spirit stopped on March 22, 2010 (sol 2208). JPL continued to attempt to regain contact and NASA announced that efforts to communicate with the unresponsive rover had ended.
Did something happen to make the Spirit rover not communicate?
It is likely that Spirit experienced a low-power fault and had turned off all sub-systems, including communication, and gone into a deep sleep, trying to recharge its batteries.
How many times did NASA try to communicate with the Spirit rover?
The timing of the 20-minute listening intervals to Spirit was not known, so multiple Sweep & Beep commands were sent. But there was no response from the rover.

Question: Did they give up on the rover?
Self-contained rewrite: Did NASA give up on the Spirit rover?