Its also registered in a lot of extensions. It may just be one of them is developed and they wanted the most popular extension
.com, .de, .net, .org, .co.uk, .cn, .ru, .info, .nl, .eu, .cf, .top, .fr, .com.au, .us, .it, .xyz, .com.br, .ca, .co, .site, .pl, .se, .in, .online, .club, .vip, .uk, .dk, .cz, .com.cn, .co.za, .me, .no, .work, .cc, .buzz, .io, .ro, .live, .com.mx, .tv, .co.nz, .space, .cl, .store, .website, .gr, .co.in, .com.pl, .com.ua, .tech, .pro, .mx, .nu, .ie, .life, .net.au, .blog, .cloud, .com.my, .world, .link, .su, .today, .xxx, .me.uk, .one, .digital, .company, .network, .nyc, .center, .global, .ink, .press, .love, .is, .photography, .tips, .expert, .marketing, .ninja, .education, .amsterdam, .family, .works, .uz, .social, .bet, .cool, .com.pk, .ph, .blue, .bz, .house, .name, .paris, .gallery, .exchange, .vegas, .cash, .dating, .black, .garden, .vg