uBlock Origin now blocks snapdrop.net if you've got the "badware risks" filter enabled, one of the built-in (I believe default?) filters. The Github issue suggesting that snapdrop.net should be added to the uBO badware filter was apparently opened February 11th, and says,

used to be a well-known peer2peer local, open source file share service, now the whole site was bought out by LimeWire and now just redirects all functionalities to LimeWire's shitty CLOUD BASED service that also promotes a crypto scam.

Snapdrop's own Github says,

Snapdrop is now LimeWire

Dear Snapdrop community, Snapdrop has been acquired by LimeWire, a leading file sharing platform with integrated AI tools. You can continue to share any files between devices, while benefitting from:

• sharing files between devices in the same network
• anonymous up- & downloads
• end-to-end encryption
• up to 40GB storage for free users
• integrated AI tools for signed-up users

Visit snapdrop.net or limewire.com

The Github repository will stay as-is and you can still go ahead and download and run the classic Snapdrop on your own infrastructure.

The Limewire referred to here, to be clear, is according to Wikipedia "a music-based NFT platform" created in 2022 with no connection to the P2P file sharing client created in 2000. "In September 2023, LimeWire bought BlueWillow, a generative artificial intelligence tool, and became a place to share images and videos created with it."

All of which is to say that snapdrop.net has regrettably fallen to the crypto AI bros, but joyous day, for Snapdrop being FOSS means that there are forks and other instances of it hosted by other people.

Edit: I can't get the instance I linked to work

Edit 2: pairdrop.net looks promising. Anyone have any other suggestions?