People are ready to invest in promises which exist only on whitepaper. As the history shows, many of these promises are never implemented. People lose money and feel deceived.
Isn't it always like that? Whitepaper and setting initial goals are only a beginning, but you need to start somewhere.
As investor - you need to evaluate chance of success - you measure: level of transparency of the project, engagement of developers, ideas behind the coin, history of other projects, uniqueness,
marketing and other factors. So far, among others gambling centered coin projects we had, vDice seems the most promising - will it work? Time will tell.