According to this Flyertalk thread, this great offer is back (normally it is just 50,000 for the Chase Ink Plus card).
You can apply for the card and should be eligible for the sign-up bonus even if you have the similar product Chase Ink Bold card charge card. At least that's what worked for me. If you have a business with a separate EIN that's perfect. But you can also build your case and use your Social Security Number as a Sole Proprietor. But be prepared for Chase Reconsideration to ask you a lot of questions about your business activities.