Wow.
Consider this:
You log in every day and receive 12 points.
That equals 4,380.
You buy a 100.00 gift card for pizza twice a year for 2,125 so that's 4,250. And if not pizza, Walmart, or whatever. And yes it's a bit more for Walmart or whatever but work with me here.
That's 200.00 in gift cards for a 100.00 charity donation or about 150.00 in other gift cards some where else.
Plus, whatever you can win in BTP or trivia.
I will let you decide of it is worth it or not but the math is clear.
Hope that helps.