Bonus gnoming is opening multiple accounts to claim a bonus multiple times. Bonus gnoming is not illegal but it is definitely against the bonus terms and conditions of the best online bookmakers. The online betting sign up bonuses are available only once per person. Some online bookmakers allow a sign up bonus to be claimed only by one person from a household or an IP address. You should avoid bonus gnoming if you don’t want your account to be closed and get blacklisted indefinitely.