Hi, I repost my question because i haven't solved the problem, I'm a member of the site freebitco.in and I have a referrer who earns daily interest. It says on the site that I should be getting 25% of that interest but I'm not getting anything. Why?

Because they don't earn enough interest. They get 3 sats per day so 25% is less than 1 Sat which is the base unit of Bitcoin. We can't credit you 0.75 of a Sat.
As you made me look at your account I'd like to remind you of our terms of service. The bot you are using to automate free rolls is very popular but it has a specific digital signature which means I know exactly who is using it.
TERMS OF SERVICE
Please abide by the following simple rules when using this website:
1. Please do not use bots.
2. Please be civil when contacting us and refrain from using strong language.
3. Please do not try to abuse the free giveaway by creating multiple accounts.
If you are found to be breaking any of the above rules or trying to gain an unfair advantage to abuse the service, your account will be deleted and your account balance forfeited.