According to ChainCatcher, 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 is questionable, with some pegging the number of such projects at just 80 to 85, while others estimate more than 1,000.

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.