What I’m saying is that it’s a tradeoff. The fuller the send, the harder it is to find a buyer, but the more they’ll pay.
Conversely, the emptier(???) the send, the more buyers will be interested, but the less you can charge.
I think going tackier would let them charge more if they found a buyer, but it would make it even less likely to find a buyer. This is already a full enough send the they’re struggling to find anyone interested, send it any harder and there would be no chance.