In many ways, this billboard is one of the first building blocks of the Unioverse. 

To understand the significance of this, you need to understand that the Unioverse is like Minecraft or Fortnite Creative mode, containing many games across a scifi universe. While much is shared across all Unioverse games, each game is a separate download/experience/product. 

That said, note that the first Unioverse game the Proving Grounds contains a robust level editor, The level editor contains a storefont with brushes you purchase for Protens:

So far.. this is pretty standard stuff. Exchange your time (a grind loop) for features (brushes in the level editor) that enable you to make more interesting content.

However, now consider 2 additional things. 
1) The second Unioverse game, Hoverdrome, ALSO has a level editor. It's not live yet, but you can see it in action here.

2) Purchases in Hoverdrome work in Proving Grounds, and vice-versa! [Barring some unsupported, game specific items.]

Wow.. now that's interesting. Suddenly the cool billboard I grinded for in Proving Grounds (which will support movies eventually) can ALSO be used to make my Hoverdrome levels cooler? Holy shit!

Back to the billboard linked above.. it is NOT a Proten-purchased, server saved object -- It's on the blockchain! So, what's the difference and why?

While everyone can buy tubes and walls and floors, SOME objects will only be awarded in tournaments, raffles and other Unioverse engagements. This allows us to create rare, limited-supply objects to reward the faithful. As I have said before, and will say again (and again, and again) in this blog - Metaverse rarity is everything. Getting it 'right' and caretaking it preserves the value of the time contribution of all our community.

So.. get out there and earn some Protens