Even online travel agencies need quality content. Do you have a travel agency online? Then you know that your travel agency needs website content to attract visitors.
Content Providers - You have to find them. You have to buy their services. You have to pay them. Is it because their services have some special magic? No, their services may not even meet your needs.
The Bottom Line - Even the travel agencies pay for contents. Does it guarantee them targeted traffic? No, it does not even guarantee them top ranking at the search engines. Remember, contents cost money.