Since the bonus is automatic, I got it right away after my deposit was made. The 3rd and last welcome bonus is a 50% match offer that requires 20€ deposit and 40x bonus wagering. So after my deposit I checked my cashier and with 30€ balance I had to wager 400€.
I know there are some games that can't be played with bonus funds but for some reason, when I opened Twin Spin slot, it showed me there was some sort of an error. It was odd as I had played Twin Spin with bonus funds there before. So then I opened Gonzo's Quest and there were no issues. I played with minimum bets for around 300 spins and managed to get a few free spins bonuses, but since I couldn't get any higher winnings than 30x bet, my balance didn't change much and slowly started to decrease. When I was down to 12€, I switched to Motorhead slot, which had just been released. I didn't manage to get any high winnings but I had a few decent 20x bet hits that let me play a little longer. Eventually I did ran out of credits and I'm sure I was really close to finishing wager at that point.
Overall I had a good time at Golden Star casino and I did enjoy this bonus. Except for the few small technical issues, I had no problems. The bonus was easy to claim and had friendly wagering requirements. I also appreciate the fact that they have nice variety of games for mobile and friendly support. I recommend them.