Why would you come up "anonymously for now" ? If you have an already successful start-up experience, why not talking about it and tell us a bit about you ? What are the risks in doing so ?
I'm a bit cautious by nature and I'm just curious about it. If I had an already successful experience and were in your situation I'd rather talk about it and introduce myself a bit. It helps to gain trust from other people and would make your request more appealing.
Anonymous = I don't have to tip my hat to people who can come up with ideas / admit that good business ideas are not as easy as everyone says they are / share any resulting credit/profits from application of ideas because nobody knows who I am.
I could be wrong. But I can't think of any possible other reasons.
I'm a bit cautious by nature and I'm just curious about it. If I had an already successful experience and were in your situation I'd rather talk about it and introduce myself a bit. It helps to gain trust from other people and would make your request more appealing.