If you really want to make money with adsense, no. of sites really doesn't make difference. Instead you can make a huge six figure income only with single site. It's possible. IT is recommended to pay your work to single site, instead working for many site...
probably low number of sites are good... but if you are a pro in this then you should have multiple sites more than 10 easily...
Same here, so I'm planning to try some manage sofewares. 1 TIP: If you want to build more than 10 websites,choose miro-niches for them or use manage software, because updating 10 different niche blogs is a horrible thing.
I have only manage one site, and earn $15/day, today I plan make another site, but doesn't have enough time
1 Meh, $10 to $18 a day. depends on what day of the week and the season. 200 I think? no wait, that's the amount of custom channels you can have. Probably it does not matter If all of them get no traffic they will probably disable your account as you are not really an asset to adsense. I wouldn't do that because it'll be a waste of time. You cannot seo and promote 50 sites. None of them will get the attention they need.