Having taken a course in SEO (Search Engine Optimization) I can tell you this is a really bad thing.
The fewer the major search engines, the worse it is.
There are currently no regulations on search engines. You might say, “so what?”
Example:
Say you want to find a hat for your pet gerbil.
You type in “hats for gerbils” on your search engine, and it should, theoretically, find the best site for you to find your little hat.
Wrong.
It will find the site based upon their own criteria.
Mary Smith knits her hats for gerbils and has a very nice website advertising the fact, but she is listed on page 395. Why?
Nobody knows for sure, but perhaps Mary didn’t use the correct Meta tags and keywords. Maybe her front page didn’t match the keywords. Maybe her site is too new, or maybe she is not a paid advertiser.
Ethically, Mary’s site should be on top of the list - that is, after all, the sole purpose of her website. But the search engine can pick whoever the hell they want to select.
In the “old days”, the search engines selected site based upon relevance and popularity.
Currently, search engines still have the “generic” site, ranked by popularity, on the left side of the page and the “paid advertisers” on the right…who knows what will happen when suddenly only two major search engines have total control of what you find when you type in your request.
“hats for gerbils”
You find:
Pet Smart
Pet Co
Walmart
Target
KMart
and 395 pages later, “Mary Smith’s Hats For Gerbils”.
Trust me, if it ever gets down to Google and Microsoft as the only two search engines, you can pretty much forget fair play when it comes to finding what you want to find through them.