Treat it as your fulltime job rather than a hobby and you can earn at least a couple of thousand $$$ each month on ad revenue after around 5 months of hard work. But don't expect to make thousands via blogging as a hobby in which case you may post one post a day or 2 to 3 posts a week.
Blogging is one of the way you can have a steady income. You have to put some hard work in the beginning. After that frequently updating the blog with good, quality content will do the job.
Blog with updated is the key but for me I dont have time to make blog. So... I just provide some free service web + adsense to making money
This is true, blogging help a great deal in making money but it requires dedication, time and money also. You can't deny that money can only be made by money.
Yes you can make a lot of money with blogs... How much is really up to you. It takes a lot of work and a fair amount of talent.
It really depends on what kind of blog you are writing. If I am a great writer and I write interesting stuff that is of interest to a few thousand loyal followers, that might not convert well. But If I write about interesting tips on finance, and I start ranking well for thousands of long tail finance terms and I start getting google traffic for finance terms.. Then Helleluja... that is 10-20$ CPM with a 100% fill rate there. And there are several such niches... The key to making money with blogging is to blog for niche that has money...or in short advertisers.
I think its a network of blogs that are needed not just one blog. There was a thread on here a while back about making $1 a day from a site, and then doing this on 100 mini sites to create an income of $100 a day. I think this woul dbe the way to go, create a lot of mini sites. However this takes time imagine trying to update 100 sites everyday. Hmmmm