If you are wondering about donating to the PFS foundation, remember that in most countries you will receive back part of your donation when you do your yearly tax statement.
For example in Spain, for any donation you do to non-profit associations until 150 euros, you will receive back a 75% of such amount the following year (it will be deducted).
When you have donated more than 150 euros, then you will receive back 30% of the amount surpassing 150 euros the next year (when you do the tax statement).
So no, it is not technically the same spending hundreds on the PFS foundation and spending hundreds on useless supplements. At least in one of these two options you have part of your money back.