Not being connected is a safe thing to scam people and blame the developer for that. Anyway, I just don’t like to send any Bitcoin on a specific wallet which I don’t control at all and I don’t know how this lottery works if you are just going to deal with the OP. We’ve better to make more research before joining, no matter how big or small the cost you still need to be careful.
I also don't support a gambling site that does not have an official representative here to open an announcement here, it's too risky you don't have someone to address your issue here, if they are serious about getting leads here and to market their project here, it's better that they acknowledge this thread by having one of their representatives to post here, just like all the other gambling site with the official thread here.