Haciento De Hermanos Cofrades 1802 Huejuquilla Juan Benancio Madera my GGG Grandfather on list

I found a document where "Hacientos De Hermanos Cofrades" 1802 of Huejuquilla. My Great Great Great Grandfather Juan Benancio Madera is on the list and paid 2 pesos. He was 40 years old at that time:

http://oi57.tinypic.com/bi9yl1.jpg

The source in LDS Website: Pg 473 of Bautismos of Huejuquilla (1817 - 1823) https://familysearch.org/pal:/MM9.3.1/TH-1-18432-14154-80?cc=1874591&wc=9L6Q-K6X:171931201,171931202,172143001

Is that a "membership fee"? Or is it a tax that the landowners paid?

Because I was reading this book online called, "Mexico's Merchant Elite 1590 - 1660 Silver, State and Society and I found this comment that says "Asiento a collection from farmers" http://oi57.tinypic.com/5prm8i.jpg You can read the book online at:

http://books.google.com.mx/books?id=ZEtgrluCM9YC&pg=PA299&lpg=PA299&dq=zacatecas+1660++colonial&source=bl&ots=f5yhqnEUJl&sig=mx5FR7h7eH0IifTX5HGBgdCvQRU&hl=es&sa=X&ei=TM7AU7_sN9PqoATJxIGgCQ&ved=0CCAQ6AEwAQ#v=onepage&q&f=false