I have the pro version as you can see in my signature. I have read in the Malwarebytes forums that the number of updates varies depending on the number of malware samples received and processed by the Malwarebytes staff. On busy malware times, more updates. I have seen it the other way too: few updates during the day.
I have a scan set up for everyday. Since I don't have my laptop on always, this means at boot everyday. It's great.
Protection: Norton Internet Security 2011 Aggressive Heuristic, Boot time, and SONAR
On demand: Hitman Pro, SuperAntiSpyware