Linea is active in CryptMeUp and extends the same broad EVM payment model into another Ethereum-aligned environment. That is useful for checkout because the chain keeps wallet behavior familiar while still being far more practical for ordinary payment moments than Ethereum mainnet.
For merchants, the real benefit is operational consistency. Linea can fit into the same direct onchain payment architecture as the other active EVM networks, without introducing a completely different mental model for wallets, assets, or contract-based checkout.
That makes Linea relevant for merchants who want Ethereum-aligned checkout with support for common payment assets, while keeping the product surface coherent across the wider set of supported EVM chains.