BTC Guild

BTC Guild is a Bitcoin mining pool that operated as a proportional mining pool (PPLNS). It was founded on May 9, 2011 by Eleuthria and operated publicly until it announced its shutdown in June 2015, citing regulatory concerns (notably BitLicense) and related risks as primary reasons. The pool was typically run from the United States (notably Nevada) and relied on donor support for its operation, with withdrawals continuing until the planned closure. (en.bitcoin.it)