ChainCatcher reported that according to Protos, Lava founder Shehzan said that it is estimated that there are about 400 "second layer" solutions running on the Bitcoin blockchain.
Shehzan noted on the Gwart Show on Aug. 25 that the actual value of these roll-ups and alternative blockchains has been questioned. Some put the number of such projects at just 80 to 85, while some put it at more than 1,000. The estimates vary so widely because anyone can “roll-up” data and broadcast a tiny hash to any miner, technically creating a “second layer of Bitcoin.”
Many of these second-layer solutions are simple clones of Ethereum roll-ups, primarily processing data on centralized servers outside the Bitcoin network and periodically broadcasting state hashes into Bitcoin blocks.
