Open sourced software related to blockchain allows creating quickly ‘me too’ projects.
Binance Smart Chain / BSC is an Etereum instance with mainnet which started operating Sep 2020.
Most of the successful projects on Ethereum mainnet got quickly ‘ported’ on BSC mainly by Chinese developers.
Often open source is used without modification in functionality, and/or without reading and understanding the code.
Almost all NFT-s and many erc20 tokens are created from the same source template.