If they are not natural traffic then it is not alright. https://www.google.com/adsense/supp...=aso&subid=ww-ww-et-asui&medium=link&hl=en_US
It's very clear that they are using BOTS to bring traffic to your site. This is clearly against Googlt TOS. Stop using it immediately otherwise you can even have ur adsense account banned I also asked Google team about this and they said it's better to not use any such kind of traffic generators as they are mostly fake or generated through scripts
I am not sure that 216 uses bots but like most other auto surf sites - it is usually just other peoples computers. so its basically useless traffic.
Even if it is actual people they will not be targeted to your website/adds so you will get low clicks/sales resulting in smartpricing messing up your good clicks with lower payouts.
it's not allowed to use traffic from automatic traffic builders. you may get big problem if you use that site
thanks to everyone who has given valuable comments about my question. So are there any sites that may help to get some traffic to my sites( in sign) and that too a legitimate traffic ?
No not really just work on your website ranking in searching engines and promoting your sites through directories and social sites like digg if it is applicable.