SatoshiPay - a micropayments provider - has been operating basic validators for over a year and recently launched a cluster of three full validators in Iowa, Frankfurt, and Singapore. A basic validator participates in consensus but does not store the full history of the network, while a full validator both participates in consensus and stores the full network history. A full validator helps other nodes join the network and improves the resiliency of the network. According to SatoshiPay, they join three full validators from SDF, two from Coinqvest, and two from Lobstr.