If I made 50 blogspot websites all in one niche ( for exmaple, video game niche)
Made 1 post on them all and social bookmarked each blogspot website to get them indexed.

When I create my main site which I want to make money from, could I not just and a Link to my main site in the blog roll of all 50 blogspot sites and then would google count this as 50 relative backlinks?

or would this not work?