[MikePT]

Thank you everyone for your replies.

What I think that will happened is what Dien said: the law of supply and demand... With more and more supply... The prices you can charge will (in the longer term) go down...

And as other products and markets, the Advertising will go trough stages, as those expressed at Breakthrough Advertising by Eugene Schwartz.

There will be a time that the same Ads will not work, they have to move to the next stage of Advertising (as expressed at Breakthrough Advertising).

So, we can almost say there are never death markets?

Just different stages of Advertising of each market?

Eugene Schwartz tells how to revive a death market.

And what he says that makes some sense to me.

MikePT