Traffic exchange do they work

I know that in our days the sites with a lot of traffic cost a lot of money and if they are cheap they are not worth buying.

If proper online marketing is done then it will not cost you even a dime to get the traffic to your blog or websites. And these days social media sites have made marketing a piece of cake, which you need to figure how to make first ;) You can create a Facebook page of your blog and divert traffic from it to your blog/website. If you want to sell something online then you can sell through Facebook shop ,which is created free of charge. Still selling a product is little bit of a challenge but driving traffic is easier. Lot of blogger accepts Traffic exchange and you may drive traffic to their site but they may have NoFollow hidden tag and so there traffic will never be forwarded to you. Better switch to youtube marketing and social media marketing then traffic exchange.