I have noticed a 100% deposit bonus a while ago when I visited freebitco.in . Is there a wagering requirement to unlock the bonus?
Are you sure about this? I don't think they have such deposit bonus right now. They are just offering 4% around annual profit on your bitcoin deposits in their wallet.
Be sure to read the bonus terms. You can only get that from Multiply BTC tab and you will need to do some few gamblings before you have an access to the bonus and your coins. I have pasted the terms here for easy access;
BONUS TERMS
The MULTIPLY BTC bonus works in the following manner:
1. When you claim a bonus, an equivalent amount is deducted from your account balance and the amount+bonus is transferred to a bonus account. For example, if you claim a bonus of 0.001 BTC, an additional 0.001 BTC will be deducted from your account balance and your bonus account will have a balance of 0.002 BTC.
2. The balance in your bonus account needs to be wagered 40 times in the MULTIPLY BTC game before it is credited to your main balance. In the above example, you need to wager 0.08 (0.002*40) BTC before the balance in your bonus account is transferred to your main account.
3. If you have any balance in your bonus account, it will be used first for all wagers that you make and the winnings will be added to your bonus account. If you make a wager larger than the amount in your bonus account, the wager will be taken first from your bonus account (until it is 0) and the remaining will be taken from your main account and the winnings will be added to your bonus account.
4. When you complete the wagering requirements for a bonus, the full balance of your bonus account will automatically be added to your main account (within a few minutes) and can be withdrawn to your wallet immediately.
5. Any amount spent on playing for the jackpot will also count towards fulfilling your bonus wager requirements.
6. You can only have 1 bonus active at any time.
7. Once you have fulfilled the requirements of your existing bonus, you can reload the page and claim another bonus (as long as your account balance is at least equal to the minimum bonus amount).
8. Active bonuses do not have any expiry date and will last forever until the wagering requirements are met.
9. Once claimed, a bonus cannot be cancelled until the wagering requirements have been fulfilled.
So, be sure that is what you want before you end up doing it. Nevertheless, freebitco.in is just the best faucet/gambling site I have ever seen so far.