There are no Bets Naps sister sites since its an independent online casino. Sites similar to Bets Naps include Azteca Bingo, Tote, GDF Play, TopTheLot, Spreadex, and Winneroo.
Bets Naps (betsnaps.com) is part of Skillbet, a gambling firm that is not licensed by the UK's Gambling Commission The company operates no other sister sites.