What is 'mobile adware fraud' known as 'HiddenAds' and how does it affect device performance?

• A.HiddenAds-type malware loads advertisement content in off-screen WebViews or transparent windows, simulating clicks and impressions without the user's knowledge, generating fraudulent ad revenue while consuming CPU, memory, battery, and mobile data in the background - the user experiences a slow, hot, battery-draining device with no obvious cause
• B.The family affects handsets carrying more than fifty installed applications, and the payload counts the package list before it activates, leaving a lightly loaded phone outside the pattern and the performance complaints a user reports attributable to something else entirely on the device they carry each day for work, and the battery figures unaffected
• C.The family replaces the advertisements a publisher sells with its own inventory, and the user sees the same number of banners they saw earlier, leaving performance unchanged and the loss falling on the developer
• D.The family appears in third-party catalogs alone, and the official store has carried nothing of the kind, leaving a user who installs from the official source outside the pattern