well let's say 1 btc donated 1 day
1 day after my btc will come back.
1 btc gone
What are you talking about?
Try to understand how the donation page works. Here is an example:
1. I am a dev for a coin called PWR;
2. I deposit 1000 PWR on Yobit;
3. I find PWR in the "Free Coins" page and click on Donate;
4. I donate the 1000 PWR to Yobit with the "Payment period" of 3 hours;
5. Now, people can go to Yobit's "Free Coins" page and get a few PWR's every 3 hours, until the 1000 PWR balance runs out;
What exacly are you trying to do/know?