I couldn't agree with you more. It didn't make sense to mine Electroneum. If you truly think about it, when the mining pool is too big, your chance of reward is much less. In a month period a typical smartphone would mine 30 cents of the coin if they're lucky. It's like free money isn't it? Also they have Blue Stacks Android Emulator. What is stopping somebody from loading 10-100 fake emulator that takes 1% processing power because all it is... is an app.