http://sigma.i2p/post/83?reply_to=319
According to my client stats over last month (not claiming that they are relevant to anyone else), their shares are, roughly: XD 1% Tixati 2% qBittorrent 4% BiglyBT 16% I2PSnark 78% BiglyBT can be over-represented because local client is also BiglyBT, and it can make cross-swarm connections. So only 5% of clients need trackers to find peers.