Pastebin for voice recordings is basically what vocaroo.com is, and I discovered that in the same context you discovered SoundCloud. And also because popular use by 4chan.
When I first heard of SoundCloud it was mostly used by self-releasing EDM artists as a place to upload their music, before YouTube was a popular alternative. Nowadays I see a lot of artists buying visualizer templates and uploading their music with that - or sending it to an aggregator on YouTube who displays a certain style of music (many of these aggregators don't seek artist permission and just upload popular songs and such, but many of the ones I follow get things sent to them by indie artists because a channel with 60,000+ subs will beat their own personal channel for recognition).
When I first heard of SoundCloud it was mostly used by self-releasing EDM artists as a place to upload their music, before YouTube was a popular alternative. Nowadays I see a lot of artists buying visualizer templates and uploading their music with that - or sending it to an aggregator on YouTube who displays a certain style of music (many of these aggregators don't seek artist permission and just upload popular songs and such, but many of the ones I follow get things sent to them by indie artists because a channel with 60,000+ subs will beat their own personal channel for recognition).