The welcome bonus is the single biggest boost you will get at 78kbd. Deposit at least ৳350 and the platform matches it at 120%, up to a cap of ৳23,500. That means a ৳350 deposit becomes ৳770 in total account credit, and a deposit of around ৳19,583 triggers the full cap.
The bonus is credited instantly via bKash, Nagad, Rocket, or Bank Transfer — all four methods qualify. You have 7 days from the moment the bonus lands to meet the wagering requirement before it expires.