A residential proxy changes network origin. That is the whole of what it does. Platforms evaluate device and browser fingerprints, account history, and behavioural patterns alongside the address, and any one of those can trigger review on its own, so no proxy configuration prevents account linkage.
Beyond that shared baseline, the platforms diverge enough that general advice stops being useful. Instagram weights session continuity heavily and punishes mid-session rotation. TikTok varies content by region as a matter of policy, which makes country-matched exits the actual requirement. Meta runs the most developed cross-property linkage. Reddit documents its rate limits and user-agent requirements, which makes compliant collection unusually clear there. The platform pages below cover each in detail.
Two rules hold everywhere. Follow each platform's terms, and test with non-critical workflows before scaling, because account restrictions carry material consequences that a proxy does not insure against.
If you're comparing workflows before you commit, explore all proxy use cases to see which setup fits best.