The money is earned by you when it is credited to your account and available to be withdrawn, even if you did not withdraw it. (However, if you had some kind of credits that were not convertible to money, that would not be income until it is convertible to money.)
You should report your own income and expenses from your own accurate records, even if you don't get tax paperwork.
If you report income from self-employment on schedule C, that is considered "earned income" from working, and makes you eligible for certain things including the Additional Child Tax Credit. Exactly how much depends on all your combined facts and circumstances.
