Admittedly, they knew that advertising would be unnecessary the moment someone tried the items they'd put up.
But Xavier knew how much preparation Luca had made just to prepare his products for auction and figured it'd be better to have something to set the price high immediately.
Also, Ollie would need a bit of this because he needs to convince his father that a sudden Sunday Auction called for contacting their most prominent clients.
He honestly got scolded at first.
And Ollie expected this.
Which father wouldn't scold a son who would suddenly ask for a grand auction with nothing but a mere hours to prepare?
Also, how and why would such clients expedite their travels for an auction when the products in question had no prior history?
So, they had to be given a reason.
And Ollie had to give his father one before he got disowned.
Thankfully, they thought about this before calling, or he would've been shaking in fear.