Members of TUG help to support and promote the use of TEX, METAFONT, and related systems worldwide. All members receive TUGboat, the journal of the TEX Users Group, the TEX Live software distribution (on DVD), and the CTAN software distribution (containing most of the CTAN archive).
In addition, TUG members can vote in TUG elections, and receive discounts on annual meeting fees, store purchases, and TUG-sponsored courses. TUG membership (less benefits) is tax-deductible, at least in the USA. See the TUG Web site for details.