That is the default setting, but some users disable it, because they want to keep their PUPs/PUMs.
Malwarebytes Adopts Aggressive PUP Policy
What are the 'PUP' detections, are they threats, and should they be deleted?
Malwarebytes Labs - PUPs
Having said that, no one program removes 100% of malware/PUPs 100% of the time.
And, because of legalities, some independently-authored anti-malware tools may be even more aggressive than MBAM at detecting and removing PUPs.
SAS is great for tracking cookies, something MBAM does not target.Download a program like SuperAntiSpyware free version which does a GREAT job of finding and removing pup's. Here is a link.
P.S. In the OP's case, they are likely re-spawning from Google sync or a Chrome extension. Until that is resolved, they are likely to reappear on scans.