“would a great idea be promoted without any marketing?”
According to that theory, Apple should cut out its entire multi-billion dollar sales and marketing and retail store divisions, because all of its great products will sell themselves.
It’s wonderful that you can (now and forever) program, maintain, market and support your product yourself. But if you ever expand to the point where that becomes difficult, you may find that you need to bring on some help. If you can pay the salaries for that help from the profits you have already made, that’s great too.
But if you need to expend money for salaries, hosting, advertising or anything else before your venture is successful enough to pay for it out of your profits, you may want to consider whether it is worth parting with some of your future profits in exchange for access to immediate cash today.
But rest assured that nobody can force you to take an investment against your will if you don’t want to (or need to.)
*original post can be found on Quora @ http://www.quora.com/David-S-Rose/answers *