Did someone even sent BTC.
Nope. https://blockchain.info/address/16L1K3HfaFpCC5hcXJjeDkUsAayUGFrS2h
OP, if you want to run a legit lottery site, you need to build up your trust first or ask a trustworthy person to hold the bitcoin as escrow.
Why not simply use an escrow website until he builds his trust? There is no such thing as a trustworthy person. That trustworthy person must have trust built too
.