If they do so for emotional gains, even when the long term results would be poor, then they will not be the kind of person who would forgo short term pleasure for long term gains in other areas. How am I not being clear? You could have an emotional hedonist who likes helping others but just be aware that then the first criticism of hedonism that came up will again apply.
Your adding to my hypothetical, and then arguing against the part you added.
Do we agree that a hedonist considers the pursuit of pleasure as their primary action guide?
If somebody derives the most pleasure from from helping others, are they not hedonistic in that they help others in order to experience the pleasure of doing so?