Am I creating an online service/tool that will hopefully be able to launch for testing by the end of next week. One of the major considerations I have had was making it a closed beta, requiring an invitation system like gmail had/has. Should I make it a closed beta or should I make it open to anyone who wants to sign up? Does anyone else have any ideas for how to boost popularity and users of the service?
If you don't make it closed I think it will boost its popularity. http_referral can boost its popularity also.