Thanks, future sensors. I understand NP is verified this way, but what about all of the other marketplaces? Is this how I should proceed with future domains — add txt verification records for all of the other marketplaces, and then point NS to NP? Will those added txt records still work? Thanks again.
Some work with unique verification
Nameservers that you can use (NamePros Parking, Afternic, DAN). Sedo does not have this.
Some work with unique
TXT verification strings that you can use (NamePros Parking, Afternic, DAN, Sedo).
Some work with unique
CNAME verification strings that you can use (NamePros Parking, Sedo).
When you change NS to the marketplace, and you want to have your domain verified this way, it can only be done when there's a unique verification nameserver method available.
When you're using TXT or CNAME to do the verification, you're NOT using the nameservers of the marketplace, but typically remain with the registrar nameservers and add the CNAME or TXT records there.
After you've successfully verified your domain at all marketplaces, you can change NS again to use only the nameservers of the marketplace you'd like to point your landers to.
For advanced users, it's possible to remain using custom nameservers and point to marketplace landers a different way, and still use TXT/CNAME for verification.