Pay what you want (minimum $20) for your first delivery of "Who Gives A Crap" recycled toilet paper.
The promotion runs from now until Earth Day (Saturday 22nd of April) or until stock runs out.
Normal subscription price is $48. Rolls are 3-ply, double length, so they work out to 25c per 100 sheets at the full subscription price.
They also have tissues and paper towel available (not part of this deal),
although if you add tissues or paper towel to your cart it looks like you can also apply the TP4EVA coupon for $10 off.
Not sure if a $30 minimum is required for free delivery with this promotion as my cart total was over $30 anyway.
Update: The TP4EVA coupon no longer works, but 48 rolls for $20 is still cheaper than their normal introductory offers (usually $10 off).