The deposit bonus of 200% is interesting but a minimum of 100$ is quite high in my opinion.
$100 minimum deposit requirement is indeed high for a deposit bonus campaign. Minimum $20 deposit requirement is reasonable for a deposit bonus promotion. Although 200% deposit bonus is tempting with 25× wagering requirements only, but OP hasn't mentioned that how the wagering requirements will be applied. Probably the wagering requirement is applied to the total sum of deposit and bonus amount.
Maybe why they apply a high for minimum deposit to this bonus promos to reduce abuse that might happen again in this promotion, as happened in their initial promotion which caused them to do maintenance to make system improvements. Don't forget to follow this if you are interested because this promotion is only valid for 48 hours.