My first comment is that there's never been any BTC advertisement. Who would pay for it? The BTC's foundation? This board's webmaster? As there's no corporation, nor an individual owning BTC, there can't be any kind of advertising.
I don't get your explanation. I will explain below why we would even bother with advertising Bitcoin. Google is going to ban ads that are related to cryptocurrencies. It also applies to Bitcoin.
Who will pay for bitcoin advertising when there is no benefit to him/her ?
We all benefit from any sort of advertisements. Bitcoin becomes more popular which means that more people are using it. If demand grows, price goes up. Quite simple, who wouldn't want their coins to become more valuable?