According to Odaily, Shehzan, the founder of Lava, has estimated that around 400 'second-layer' solutions are currently operating on the Bitcoin blockchain. During the Gwart Show on August 25, Shehzan highlighted that the actual value of these roll-ups and alternative blockchains is under scrutiny. There is a significant variance in the estimated number of these projects, with some suggesting there are only 80 to 85, while others believe the number exceeds 1,000. This discrepancy arises because anyone can 'rollup' data and broadcast a small hash to any miner, technically creating a 'Bitcoin second layer.' In reality, many of these are simple clones of Ethereum roll-ups, handling most activities on centralized servers outside the Bitcoin network and periodically broadcasting the state hash to Bitcoin blocks.