You're saying that meme coins can be divided into different blockchains like BSC, ETH, Solana, and so on, and so forth? It doesn't work that way, but it's a completely opposite one.
Meme coin is a category of an altcoin, and these meme coins can be created on different blockchain like BSC, Ethereum, Cosmos, TON, Tron, Solana. Both have difference.
From a proof of work meme coin, Dogecoin, developers try to expand meme coins to smart contracts because it is more easily for them to create new smart contract coins. They don't need any support from miners to keep their projects going because there are parent blockchains like Ethereum, Binance Smart Chain, Cosmos, Ton, Tron, Solana do this task.
This gives scammers greater chances to boost their scam intensity to a higher level. This gives greed people more risky chances to take risk and lose money.
TBH, it's quite surprising that Solana-based meme coins are the most popular ones right now.
I'm not following the meme coin trend and it's hype hence, I don't that they're the most popular meme coins as of this moment. Anyway, for sure many investors are making money off of it and as many make money on it, many are also losing their money.
Even the recovery of Solana from bottom is big surprise that trigger the universal surprising of Solana ecosystem recent months and meme coin creators quickly parasite on Solana blockchain and this hype to get benefit from it.