Which is why it's irritating that the article left out how he's going about this. I want to know if a majority of his finding were on a site like bugcrowd or if he's trying to do the freelance thing and just getting shot down. I have no input or information about experiences from freelance bug hunters, so I don't know if being ignored is a common thing or if this guy just isn't that good to warrant himself attention.
Yeah, he could be throwing up stuff on openbugbounty, with its "spam 30 different @company.com email addresses" method of bug reporting.