As a publisher trying to find a viable solution of letting advertisers target on a publisher-owned interest group I have a few questions.

A publisher (or a third party working on the publisher's behalf) might create and own an interest group of people who have read a certain type of content on their site. Publishers can already use first-party data to let advertisers target their readers on the publisher site. A publisher-owned interest group could let publishers do the same even when those people are browsing other sites. Publishers would presumably charge for the ability to target this list. - FLEGDE.md

1. A publisher wants to be the owner of an IG, but in this case a DSP has to add them to .well-known. Won't this be a risk to a DSP? In theory publishers could overwrite the DSPs audiences.

2. How can a publisher create the IG with their code if they are supposed to be in the advertisers base, so that the advertiser can bid on them. For example a publisher received permission from some DSP via .well-known to create joinAdInterestGroup() on their behalf with owner: 'DSP.domain'. So it means publisher must generate IG name and trustedBiddingSignalsKeys for this DSP and pass the info to them. Or how should this work?