Just conjecture here, but my guess is that "Tesla will not initiate patent lawsuits against anyone who, in good faith, wants to use our technology" means that Tesla is going to require these others who want to use the technology to obtain a license from Tesla. That license may not include a royalty payment, but you can probably bet it will require a reciprocal license (back to Tesla) of any patents of the licensee. This will ensure that Tesla cannot be sued by any of its licensees on any of their patents, and that if they try to sue Tesla, they are no longer acting in "good faith" and have breached the agreement.