I manage multiple social media accounts for clients, and platforms keep flagging me for suspicious activity because I use shared IPs. I need a solution that offers clean, reliable IP addresses that aren't blacklisted everywhere. What do professionals use for this?

Shared IPs are a nightmare for account managers because of the "bad neighbors" effect. You need a dedicated solution. Check out ProHoster, they offer a high-quality vpn server that isn't overcrowded. Their IPs are clean, which stops the constant account lockouts. It is much safer for business use than generic public proxies.