FYI: running MalwareBytes once a day is overkill, unless you are installing new software from sources besides the App Store everyday (or frequently enough that a once a day habit is good to have).
At the moment, the only malware and adware that can get on the Mac must involve the user doing the install. Many times the user is "Tricked" into do the install, such as a download site putting their own installer around a free or shareware package and the download site does a side load of adware which they get paid for, or a developer agrees to do a side-load of adware for a fee when installing their software. And sometimes malware puts up a webpage that looks legit, or even just puts up huge Green ad banner that says "Download" on a page where you can download something legit, and trick you that way.
But if you are not installing something, then you are not getting adware or malware (again, that is the current state of malware/adware on the Mac).