Discussions of cryptocurrencies and other blockchain technologies are bedeviled by a nearly universal assumption that attributes that are possible to achieve in theory are guaranteed to be realized in practice. Examples include decentralization and anonymity.Back in June David Gerard asked: How good a business is running a Lightning Network node? LNBig provides 49.6% ($3.7 million in bitcoins) of the Lightning Network’s total channel liquidity funding — that just sits there, locked in the channels until they’re closed. They see 300 transactions a day, for total earnings on that $3.7 million of … $20 a month. They also spent $1000 in channel-opening fees.Even if the Lightning Network worked (which it doesn’t), and were decentralized (which it isn’t), Gerard’s point was that the transaction fees were woefully inadequate to cover the costs of running a node. Now, A Cryptoeconomic Traffic Analysis of Bitcoin’s Lightning Network by the Hungarian team of Ferenc Béres, István A. Seres, and András A. Benczúr supports Gerard’s conclusion with a detailed analysis.