Presently we do not have mentioned anywhere about the age restrictions. However, to get payment you need to have at least 18 years crossed. I think somewhere I have mentioned this. I could not provide the link now. Sorry for that.
There is no maximum age restriction as informed. The minimum age restriction of eighteen years also does not seem proper. The site is for knowlegde and not employment. The minors especially those in teens need to participate more so there is no reason why the age restriction should apply. If legally necessaary, a minor may be asked to get his guardian's approval for receiving payment. Even banks open minor accounts under guardianship. Bodduman may also do so.