I have no idea. They must be catching some big traffic moving between exchanges or traders arbitraging that need instant transfer or something. Thats a crazy number.
How is that possible? nostr:nprofile1qqsf5wdlsd7gdrtpakxvu6jv0g8tjm67t0xqs2kk4lw4f9ktv99z87cpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtcpz9mhxue69uhkummnw3ezuamfdejj7qg4waehxw309aex2mrp0yhxgctdw4eju6t09uzad58e is generating a 0,6% yield, and this seems more reasonable.
Discussion
At least a big part of their sources are CashApp users. The node is positioned in such a way that any payment from those users have to go out via the c= node. On the way back I'm not sure if they catch all the traffic but all outbound from CashApp goes via c=.
Kinda feels like a shadow fee for CashApp users since they both fall under Block.