I used to work in radio advertising a long time ago.Though the medium is different advertising principles are much the same.
The three parts of the advertising picture are the buyer, the seller,and the product. The buyer is the advertiser. The seller is the program or network. The product is you! That is, the program attracts a certain demographic the advertiser wants.
Some programs or networks are financially able to pick and choose. Most will take any advertising they can get just to stay on the air, including some that may seem contrary to their programming.
Many Spanish speaking viewers are conservative, especially those that have escaped socialist dictatorships, such as Cubans and Venezuelans. But really, advertisers don't care about their politics, they just want to sell the products.