Well, you kind of WANT exclusivity for those brandable name marketplaces, because the names there should be brandable.. like stylish made-up names .. that you wouldn't expect someone to just type in in a domain search at a registrar. You come to particular brandable name marketplaces like BrandBucket, Squadhelp, etc. for ideas, to take a look at existing offerings, which means that what's important or what really matters is that you domain name gets shown or promoted by the brandable name marketplace, rather than non-exclusivity or how many of these places you list your domain at. Brandpa is sort of different 'cause I don't know how curated it is really, but you can just submit any domain name and it gets auto-accepted. Their change in stance to doing that would indicate that less curation is done. With SedoMLS Premium etc., the real issue with exclusivity is covered .. 'cause someone can just go to any of the many registrars and type in a name and they can purchase the premium name at that registrar, and they are not 'lost' as to where to go to purchase the name that they want.