I dont know what group they are from but if you use the sign bonus read the T/Cs carefully, only slot wagers count and it is 20x bonus and 20x deposit.
I got the terms here,
The purchase amount must be wagered at least twenty (20) times, and
The bonus amount must be wagered at least twenty (20) times.
Unless specifically stated otherwise, all free money that has been awarded (including but not limited to free casino credits, prizes, or service credits) must be wagered at least twenty five (25) times before it may be cashed in. Very often the wagering requirements may be in excess of twenty five (25) times, so it is important to familiarize yourself with all of the specific conditions pertaining to each promotion.
Slots only play will count in respect of bonus wagering requirements. All other games are excluded from counting towards wagering requirements.
Wagering counts towards bonus requirements in the order that each bonus offer is taken up i.e. wagering requirements need to be met for each bonus before subsequent bonuses may be cashed in.
If a player does not want any bonus which has been deposited into their account by the casino then they are entitled to request a casino support consultant to reverse the bonus out of their casino account, by way of e-mail or telephone call, where after the reversal will take place.
If a player has made a deposit to which a bonus has been attributed and deposited into their casino account by the casino and the player then wishes to cash-in the original purchase amount without having met the wagering requirements with regard to the bonus, then the bonus amount will remain in the casino account until the necessary wagering requirements with regard thereto have been met.
ThunderLuck Online Casino reserves the right to audit any cash-ins. No cash-ins will be allowed under any circumstances, nor will any promotional offers be honored, until a minimum purchase of $20 is made on an account, and any subsequent purchase match bonus is wagered in full. The minimum cash-in amount at ThunderLuck Online Casino is $20. The minimum cash-in amount in order for a check to be sent is $30.
The ThunderLuck Online Casino team will be the sole judge in respect of honoring any promotional offer. ThunderLuck Online Casino reserves the right, exercisable in its sole discretion, to discontinue or cancel any promotional offer at any time for any reason whatsoever and without any prior notice. Any person deviating from the promotional rules may be disqualified without notice. The promotional offers are closed to all employees, contractors, advertising agencies, and their immediate families associated with the casinos at which the promotions may be taken up. Each promotional rule shall be severable from each of the other rules, and if any rule is found to be void, invalid, or unenforceable for any reason, the remaining rules shall remain in force and in effect.