Ok, add the ICANN fees too.
I don't know... there is a fee for all, anything else is a matter of personal choice, some can use kilu.de or any other free hosts allowing proxies, others can buy expensive servers or .pl domains instead of .info for example. From another point of view anyone could use .co.cc free so no one should feel discriminated.
As i said i believe the guy using them has many free coupons, even 1$ per proxy is not so chep to submit 5-10 proxies and make few $ in return. He is doing all for free. Without the hosting fees is 100 % profit for him i think. IMO