@jb55 listened to a podcast you did a few months ago, where you talked about leveraging follow-packs as an on-boarding method. I think in second instance, follow-packs are a great thing, but new users should start at curated relay feeds first, instead of curated follows;
The user selects interests, so showing them stuff that aligns with those interests is indeed what you want; but whether the user actually wants to follow those people or not is a second thing altogether; and if it turns out they don't, they are forced to take some action.
Whereas with relays feeds, they just pick another feed and are not attached to anything; the only action the user is ''forced'' to make is this learning moment that they can change perspectives. You could always offer associated follow-packs consisting out of the npubs the relayfeed is made out of.
With a relay feeds you can curate on the event level, instead of getting all of what npubs publish. Also, these topic-(sub-)relays could be read only, scraping stuff from other places; users interacting with those events will do so using outbox anyway.