Resteems do not guarantee anything more than more people seeing a post that has already been created again and again with more resteems.
Upvotes, comments and follows is not as a result of resteems, but is dependent on the author of the post, the quality of the post, and the personal preferences of the viewers of the posts.
The resteem service i am providing, is to meet a need in the steemit community, which is, providing additional opportunities for peoples posts to get another chance to be viewed by more people. The reward comes second place as compensation for the efforts we make in providing the service.
Basically, resteeming a post, is like refreshing or reloading a web browser.