I decided to use submit click for one of my websites which had been doing well and was already breaking into the 1st page of google with a few keywords because I was overrun with work.
Worst mistake I have ever made. They tell you that they place in text links on relevant web sites but all they did for me was place links in comment boxes in irrelevant sites. ( comment spam) About 2 months after signing up I started noticing this but it was to late. I was contacted via my google webmaster account that a manual spam action had been placed on my account and that I needed to remove a list of links which were created by submit click. I contacted them asking them to remove the links which they agreed to do but never did even though I pleaded with them that they had ruined 2 years work and all the revenue generated by that website.
All I can say is I should have known better considering the price they charge. Don't use them as you run the risk of getting caught by google and having your site penalized.