Ask HN: Why are there no good domain auctioning websites?

I know there already exist market leaders such as godaddy, sedo, dynabot and other registrars where people can auction and bid domains. But I fail to understand why almost all of them are exclusive to their own platform and won't allow those with having their domains on other registrar and the enormous commission rate that they charge is horrendous.

Why isn't there any new age startup working on this almost all of the existing players are about a decade older or more so they are slow and sometimes won't even innovate.