no not at all.some people who are making a lot of money with adsense actually have multiple websites - mostly microniches and also niche blogs.You know what?Google should be liking them because niche blogs convert VERY WELL for advertisers.So both the advertisers and google are happy because of these niche sites.So having 50 or 100 websites is not a problem at all.
Why would you say that? Google, themselves, says that you can put it on as many sites as you want. Amazing how many wrong answers get posted in here
Thanks everyone for the answers. I'll definitely beaware of the Google AdSense rules. For some of the affiliate sites that I plan to create, I'll probably just use Adbrite so it doesn't break Google Rules. I plan to make them manually. I've been trained in graphic/web design for over 7 years. I can make one professionally designed website in about 1 week with 20-30 pages of contents. I'm planning to make about 50-100 sites in the next 2 years. it's my full-time job now
no limit for websites. as long as it does no violate the adsense TOS. so there will be no problem at all..