Literally anywhere you go just to advertise your project all what matter is the number of people who will see it because chances are a lot of them will be interested in what they are seeing, if the blogger has millions of viewers then definitely you will have some people interested of course it will be more if what the blogger is blogging about are related to what you are advertising. The way I see it is the effectiveness in advertising is always about numbers and how you can relate to the people seeing it.