You need to be careful with the 'closed beta' stage, It's really easy to get "sucked" into that state for a longer period than you thought and blame all of your

You need to be careful with the 'closed beta' stage, It's really easy to get "sucked" into that state for a longer period than you thought and blame all of your shortcomings on being in closed beta. Don't forget to ship. Regarding the 'open beta' - I don't think it's applicable, if you're open to users and anyone can register and growth hasn't happened yet, investors will spot that.