Multipool also has a huge share of the network hashing power, but is designed to hop between whatever happens to be the most profitable coin. So for someone looking to get into DOGE for fun, it's not the way to go.
Huh. Didn't know they had that option. But either way, along with #3 in the top level comment, Multipool also holds a massive share of the total network: http://i.imgur.com/n9xaRQo.png, and if a lot of that is profit-hoppers, when they change coins, that will leave Dogehouse with even more share.
