My experience with m cent browser is worst because on 1000 points it gives you 1 ruppe so you think how much time it will take to have first recharge.
The demerits that I found in m cent browser are as follows-
If you want to earn some recharge don’t be reliy on this app because it will take a year to give you your first recharge.
Lot of ads will be shown in the browser here and their but the amount of money given for them is so less. And it also effects your phones performance.
Outdated technology- The technology and interface of the app look very outdated and it effects the performance of your phone in many ways it will decreade your battery backup and your phone can also hang.
Hope this will help you.