Why they will not buy it ? did i asked for a high rate ??
Quote from bitgold's TOS:
11.3 BitGold may disqualify you from a promotion and/or claim back Promotional Balances if it believes that your account or subsequent referred accounts have has been set up to abuse the promotion or if you are otherwise in breach of this Agreement or the terms and conditions of the promotion. BitGold reserves the right to suspend, modify or terminate a promotion at any time and without prior notice.