I run my whole business on Multilogin, the FB ads stuff at least. I have about 30 FB profiles and a ton of Google accts that we use for local engagement stuff.
One time my PC crashed while I had MLA open, idk what happened but I lost the cookies and browser history of 2 or 3 profiles. They could not be recovered and thankfully I was able to get backinto the accts. I was spending a good bit of money in those profiles and I was very angry. But ultimately nothing could be done and MLA gave me like 2 months for free ($399 plan) to make up for it. So they are good people and that issue never happened again.
I was interviewed by MLA recently although they haven't posted the video yet. I didn't really get to talk about much strategy stuff, but mainly how MLA benefits my business. I had to get up at like 430amto meet with them so I was tired and probably a little weird.
I contacted Incogniton and Kameleo when I was mad at MLA about losing those profiles. Both companies were very cool and Kameleo gave me a free version of their new beta to test. Both companies were honest about their capabilities when i asked about automation. One of them advised me to wait a bit for an update before making the switch, but I won't be switching yet. I just think both of the companies above are honest, which you don't see all the time in the FB ads/acct mgmt world. Most people just say, "yeah yeah, it works, by my stuff..." but these two were not like that.
In my mind MLA is like the gold standard. I trust their software to let me manage accts that spend a very large amount of money.
Here's my stack for FB ad and managing profiles for advertising:
Browser: Multilogin (may consider Kameleo as backup or possibly second platform)
Proxies: Oxylabs, Luminati (pay as you go currently because some Oxylabs IPs in certain geos are trash), Soax (haven't gone full force with them, but their IPs are very high quality).
Acct Source: PremiumAds, plus my own method for sourcing real accts.