There is no doubt in my mind that aliens do telepathically connect with some humans who put in the effort to try and some even get a chance to meet them. I do believe that Granger Tylor did actually do what he said he said in the note. He was too intelligent and too serous of a man to act irrationally. So, somewhere out there is our little buddy on some alien world living among a alien species and communication and learning things we can only dream about.
What are the benefits of living with a space faring species? Well, eternal life is one…aliens would have such advanced technology that its possible to extend your life for thousands of years and maybe forever. For another they could genetically enhance him to learn more, retain more information and basically be more on the aliens intelligence level than our lower primitive level. With such a stimulating environment I totally understand why he never came back home.
Scott C. Waring