I finally got four, one for the first 10 rolls and and three others for reaching the 20th. What is not clear to me is whether anyone has made it to the 30th. I think I was very close to the deadline but I don't know exactly when the promo started.
A good number of people have received the maximum 9 GT by making the 30 hourly faucet roll within the given time frame. I have also received 4 GT like you. The promo had started at 10:00 AM (GMT) on the 20th February. I tried to make the 30 faucet claim during the promo period, but I managed to do 27 claim before the end of the promo. I'm still satisfied for the free 4 GT which I have received from this promo.