Like all these things there is therory and actual – In theory tyou can’t advertise but they do – Its just finding the way around it….
Good things I think you coudl use Facebook for
1 – If you have a community orientated site – You can reinforce thsi with a group but this also helps to aquire new players as well – No one quite understands the Facebook alrorithm yet but if you can get your group at the top of a good keyword in their search box this could be really useful for getting you exposure
2 – Events – Events don’t have to be offline – They can be onlien to so for example for a free roll you are organising – remeber Facebook is viral – The stats say that for every item that appears in a users news feed it is read by 32 other people so every person that says they are “attending” is giving you exposure to on average 32 more people
3. Use the thousands of Applications – There is loads out there you can use to promote your business just search and try them out – One I liek is Facebook Notes which is kind of a blog type software but I have seen people use it as PR release because you can teh tag people, events etc into it plus people can comment on it and again with the viral aspect of facebook these comments/tags go into their feed which again is seen by those 32 people….
4. Also look at building your own application – There are loads of companies out there that can help you with this and remember it doesn’t have to be complicated just original and sticky/interesting enough to become viral and used on a regular basis.
There is heaps more you can do – Just google and you will find loads of suggestions for Facebook and all teh other community type sites out there