You lost me at 'the project'. My primary point is that the recommendations in the article don't scale well, nor do many of the recommendations I'm seeing in here. Paying folks under the table with gift cards is very low risk on the order of tens of candidates. It's not on the order of hundreds or thousands, particularly if you're operating in a market that is already highly regulated financially.
As an unrequested piece of advice, 150 hires to an engineering organization sounds like a gigantic waste of money. Perhaps you should give me the project and see if I can deliver it better for 1/150th of the price.