Since I started I have taken them once every 24hours. The two times I didnt get paid I did try again the same day. For instance , I took 1 before I went to bed and when it hadnt credited 10 hours later I tried another one. I have always been paid for these the first few minutes after the first hour that I take them, so I assumed when I hadnt been paid and It let me take another it meant I wasnt getting paid fo the other one.