It's fine.
It requires a little different approach from 2-3 years ago - but it's fine.
My buddy El-Horto has about 50 sites and they each bring him about $5 a week.
I used to have 100+ but did them too "rough and nasty" and google decided to move them all from top 20 to somewhere the other side of 50 more or less overnight.
A good IMer can make 2 a day - and that includes all the SEO work they may ever need as well.
Me? I used to make 5 a day, a bit slapdash, many were less than 500 words of unique content and a quick indexing blast and that was the lot. Worked for over a year - then lost them all.
All on one hosting account as well.
But I know for sure the general method is still fine. Just needs a bit more thought.
I'm not bitter
Scritty
What method do you recomend right now?? I need money in less than 2 months and i don't know where to start. Maybe some content locking ?
(sorry for my english, i'm from spain)
One thing is for sure, you wont get rich on micro niche sites unless you upscale big time.
I'm somewhere between 1$-10$ per week per site on those ranking at least in top 5
Some a little more, some a little less.
While if upscaled it can bring decent money, its hard to work maintain 50+ sites and their rankings. Some stay in top 5 others drop if not having a steady stream of BL's
Also the adsense ban risk increases along the # of niche sites.
Myself I'm about to drop the micro sites and going for mini sites instead.
Actually just expanding some of the micro sites to mini sites instead ;-)
what you call mini ??? how many pages?