I couldn't disagree more. Ock was the one who forced Harry to take the deal, not the other way around.
Ock's orginal deal had nothing to do with Spidey. It was only after Harry told him to get him did Ock actually go after Spidey. Ock was getting Spidey for Harry, and after Harry would reward him with what Ock wanted. I call that a henchman.
But Ock initiated the deal. It wasn't Harry who went after Ock.
Ock just wanted Harry to give him what he needed for his experiment...Harry took advantage of the situation, Ock probably only went along with it as he saw that taking Spider-Man out would be good for him as well. I'm sure if he wanted he could have persuaded Harry to just give him what he wanted if he didn't want to go along with it.