You don't have to play but you will need a Splinterlands account. A node pays SPS and vouchers everyday. Currently, around 22 SPS and 4 vouchers per day. That's around $2.32 per day or $846 per year. Nodes are currently $1490 on Tribaldex. So, the current return is 56 percent, but it will decline as more nodes are sold. However, the SPS and the vouchers can be used in liquidity pools to generate better than 50 percent returns. Also, SPS has an inflation problem, so if the value of SPS continues to decline, then the return from a node evaporates. I am bullish on nodes because of the strong passive return.