1- By posting topics.
2- By replying to topics.
3- By getting people to reply to your topic you also get paid.
4- referral program.
Earning in diropia is very easy, all you need is register an account and start browsing the forums, you can earn by posting a new topic, or replying to others, the amount of money you make will grow depends on your reputation, if you spam or type non sense you will get your topics deleted.
Also this is not meant to be a source of income, this forum only rewards users for being active, while in the long run you can make decent amount of money here, it’s really just a reward for people who spend time on forums, so at least they can spend time and gain from it at the same time.
You can also earn using the referral program which pays really good, $0.25 per visitor.
Withdrawal and earnings are in USD and can be done from the withdraw page.