ViaBTC is a Chinese mining pool, one of the largest (a leader in BTC, BCH, and LTC). It has been successfully operating since 2016, so questions about its reliability and honesty are out of the picture. You can mine various coins here, including not only the main ones but also ZEC, DASH, RVN, and other altcoins. The fees, although high, ensure a stable profit withdrawal. I have been participating in this pool for two years now and have no problems withdrawing all my crypto. Besides the pool itself, ViaBTC has a well-developed ecosystem that I have personally explored. First of all, there's the CoinEx cryptocurrency exchange (a convenient platform with spot and margin trading options, contracts, etc.), the ViaWallet (a decentralized multi-currency crypto storage), as well as an investment platform and other products that do not interest me.