Anecdotally I've never heard anyone say "VRBO." Maybe they are using it but just saying "yeah we stayed in an Airbnb" kind of like if you use Lyft but call it Uber cause that's the more common noun.
So I feel like they did successfully establish themselves as the noun for that kind of thing, which to me speaks to the power of the idea and the marketplace they created because the name doesn't exactly roll off the tongue.
But overall I think the hotel room market is just much larger than the "boutique group stay" market so they have to maintain position as a direct hotel competitor (but I think it is an issue vis-a-vis people complaining here about things like having to coordinate with an individual even though they willingly chose that route).
