I was an admin, but have retired and am no longer formally part of the administration for the org. I highly doubt any of the information I'm posting is inaccurate, but it does not necessarily reflect the views of the current administration. You may want to wait for a member of the current administration to verify my information.
Paypal does charge fees for donations, at least that was the case the last time that I checked. Paypal doesn't charge a fee for certain transactions (like cost-of-living, ie. sending rent to your landlord), but donations still pay the fee. It's the standard $0.30 USD + 2.9%, which for $1 comes out to $0.33. Thus, the org would get $0.67. Donations to registered 501(c)(3) organizations incur less fees, but unless I'm mistaken, the org is not a 501(c)(3).
The monthly pledges just send out a reminder for you to make another donation via paypal. The donation system does not (at time of writing) use the "Recurring Payment" part of paypal's API.
Any amount of money is appreciated, though $12 per year is the de facto standard. The org gets more of the donation if you do it all in one shot ($11.64 vs $8.04). In the end, though, I can't stress enough how important smaller donations end up being. I think the only thing a total donation of $12 gets you is a 300MB file upload limit for AMVs hosted locally.
is the correct recipient. It is a remnant of how donations were handled in the past (which according to the source code for the org, was at one point different for cash and credit card donations).
Yep, pretty much all of the FAQ, About Us, etc... information is horribly outdated.
Hope that answers your questions.