I have read about giving as one way to be blessed.
Giving can come in form of anything; it could be giving of your time to a course; talent and gift, resources and so on.
I am sure of one thing however, giving of anything can increase your own happiness and good feelings, but is giving a factor to becoming wealthy? I am aware of the Forbes list of the richest, I am yet to hear any of them attributing his wealth to giving away if his resources.
I strongly agree about your opinion that by giving something to others can be a fortune opener that can be wealth for us.
I believe in the power of giving, it is in accordance with my religious teachings, we must be able to sincerely give without expecting rewards or anything,so God will repay all our goodness to others through unexpected fortune.