I’d recommend checking out https://multilogin.com/ or https://ghostbrowser.com/. Both are solid options for managing multiple profiles without Facebook catching on. Multilogin is the more popular choice for people running multiple accounts, it offers a yearly package starting around $199/year for their unlimited profile plan, and it’s pretty powerful with features like fingerprint spoofing and proxy rotation. On the other hand, Ghost Browser is more affordable, with their pro version priced at about $25/month, but it’s a bit more limited when compared to Multilogin.
If you’re looking for the best long-term value, I'd go with Multilogin, as it’s tailored more for large-scale operations. Also, don’t forget to pair these with a good proxy provider like https://smartproxy.com/ or https://www.luminati.io/ to keep your accounts safe and under the radar.