The companies that buy up sites like Bandcamp are interested in nothing except ensuring the executives’ pockets get lined appropriately. Growth is the only thing of interest. It’s the story of capitalism, but here, like with MySpace, it becomes a matter of cultural preservation {read}
In the meantime download your music libraries and the PDFs of articles you’ve written if you’re a writer. Make your own web stores to sell you art. Pay the people you believe in to write about music. Nobody will preserve the culture you care about for you. Nobody can make it better but us.