Myspace died because
1) It slow to load
2) A lot of mp3 automatically running , when we open any one's profile
3) Huge spam like message sending, bulletin posting, comment posting
4) No online chat facility initially
5) A lot of unnecessary customization
6) Totally dedicated to music industry
Facebook Get Success:
1) Much faster to load
2) A lot of good application to interact with friends
3) Not much customization
4) Good privacy setting
5) Online chat facility
6) Dedicated to young mass of 13-25
7) Not related to any specific niches or industry.
8) Auto spam filter for message sending, friend adding, wall posting, which reduce spam content much less
9) Only event invitation making spam issue, later facebook turn that to notification to reduce spam