Is there a reason for deepbit to be so popular despite it's being popular anyway?
I mean they charge the highest percentage and all these 'advantages' they offer like paying for invalid blocks is a statistical zero sum game...
simplicity and safety, i dont care if i earn a few bitcoins less each month as a tradeoff. I log in their website once a while and see my coins automatically transferred to my wallet, all my miners running, and everything just works, website is easy to use and the whole exercise takes less than 30 sec, then i move on with my life.
they had some stability issues a month or two back which i complained loudly and almost switched pool, but since then no downtime or any problems so i stayed.
also their size alone give them legitimacy, as it's less likely they will do anything shady behind the scenes.
the only thing i wish deepbit will implement is an alarm that auto sends an email if your miners are down, as it is now i still have to log in once few days to check on my miners.