About this particular scam, I'm a bit puzzled. I'm not all that familiar with Tron but didn't think it was one of those coins you could mine. It's strictly proof-of-stake, am I right? And if that's the case, then anyone offering Tron mining services is by definition a scammer. Even if that isn't true, those promised returns are higher than what anyone could earn by staking it or even mining a typical altcoin. Too good to be true means not true, always.
ScamViruS is correct, though. The idiots behind this blatant scam are clearly targeting individuals who don't know much about crypto but might have heard about the outrageous profits some people are making and want to get in the game. I'm sure there are tons of people like that around, especially with bitcoin being above $50k.