Some things we can do about the lucky dip system.

1.) Show the captcha via each account check for the person who is submitting the accounts to submit using PHP

2.) Create an account checker that checks the accounts via the users own IP showing captcha if needed and after it checks changes password etc etc then submits to LG's Lucky Dip system

3.) Use proxies (not sure if gaia allows proxies any more)

I go with 1 and 2 personally. You or when Alex get's back can create and embed an account checker using java into the Lucky dip.