new gtlds How many full-time domainers focus exclusively on new TLDs?

Globally there are probably millions of individuals who make a living offering website development, marketing and SEO services. Most full-time domainers entered the space fifteen to twenty years ago. Those portfolios tend to have a high percentage of .Com domains. We now have perhaps as many as 25 million speculative new tld registrations. There are some domain investors making money with the new extensions. However I am curious how many full-time domain resellers are new tld exclusive.