Optimal for what? Advertising is a two sided market with advertisers bidding on the other side. It could so happen that the bracelet brand was willing to pay mo

Optimal for what? Advertising is a two sided market with advertisers bidding on the other side. It could so happen that the bracelet brand was willing to pay more for your eyeballs than any of the brands you actually like. Without knowing the bids there’s no way to evaluate if what was shown was suboptimal