Here are the relevant parts of the terms:
"11.2
Promotional Balances are equal in value and redemption rights to traditional BitGold balances in your BitGold Account provided:
- the recipient of the Promotional Balance has logged into their BitGold Account at least once over a sixty (60) day period following deposit of the Promotional Balance.
- the recipient of the Promotional Balance has made a deposit of funds into their BitGold Account at least once over a sixty (60) day period following deposit of the Promotional Balance.
11.3
If
the recipient of the Promotional Balance has not logged into their
BitGold Account for a period exceeding sixty (60) days, and no external
deposits of funds has been made into the BitGold Account during such
period, BitGold may, at BitGold's discretion, reclaim the Promotional
Balances to BitGold's own resources as an unclaimed promotion."
Luckily, it is easy to get enough free Bitcoin to fund a minimum deposit. I have written a short guide here.