There are also a lot of 'photographers' on FB who campaign for likes. ie "Like my page and if I reach 1000 likes, I will be giving away a free print from any of my photos, tell all your friends to like me too!". People are using a social networking (viral marketing?) website as a business networking one.
For good quality professional photographers, facebook can offer a great marketing tool to get new clients, if used well. After all people on FB announce their engagements etc on the site. There is a market there. Just yesterday I was sent a wedding invitation..via facebook. No more high quality printed invitations= money saved to spend more on a quality wedding photographer (no not me), I am going as a guest.
But over-supply, especially at the cheap end of the market, often by photographers who do not have the skills to really be calling themselves photographers, is going to see none of them become profitable businesses. They use FB cause it is FREE. Unlike putting an ad on radio, in the local paper etc.
Just cause you have lots of 'likes' doesn't mean you are a good photographer.
Re prints and digital files:
Depends on the skill of the person buying the photos. I would happily take digital files and edit them myself (I would want the RAW files).
Someone with a teenage kid doing graphics design etc at school. "Oh mum, can you just get the files, I am learning about processing photos at school and I could do em". Could be an influence on the client.
'but the photos are for use on our website only, we don't need prints'
There are untold reasons why one person wants files and another wants prints. Neither are wrong or right, and I think any photographer who does not listen to the client and have a pricing plan for both options, is selling themselves short, and losing business. Why limit your business, when your clients want something that you can deliver?