So there is different rates between getting 1 millions traffics in 10 days and the other within 7 months. Well, they are right this service offers will only boost your website number of views and may rank you up but if you want referrals and for marketing purposes then this is not suitable for you.
Yes, because referrals and sale traffic are highly expensive. Even google adword and Facebook ads don't convert sale. Only people have subscriber can make sale.
New website, pop-up, Cpa website can use this traffic.