Most people use generic hashtags like #VSCO or #VSCOcam. For true randomness, try obscure or hyper-specific tags:
VSCO profiles are semi-private. By default, a user's grid (the photos they publish to their journal) is public. However, VSCO has built-in rate limiting and session tokens. This means that while you might view a profile without logging in via a browser, you cannot systematically "scrape" random profiles or use an automated "viewer" tool without violating VSCO’s Terms of Service. vsco random profile viewer