This requires skills and good capital to ensure that 10% profit, not necessary the project are good to rise in Binance, they are just good enough in hyping the project in IEO they hosted, so the value will rise, it's like a manipulation for me that they can also participate.
Well, that's the game, but like you said, 10% guarantee is possible if you know how to play the game and siding them will mostly give you profit as newbies will just continue buying and end up holding the coins they bought when the hype is over.