Alright, go and hire a developer for 0.5 BTC for developing a site which is almost two years active with many daily users.
The Monero miner is not secret. User `akamit` has soon mentioned in the topic if you read.
Tell me more about the site statistics?
How many daily users? How many lottery participants per week? per month? How much revenue if the website generating outside of lottery ticket sales?
also user akamit only mentioned an anti-virus blocked something intrusive on your website, you mentioned it is actually a monero miner afterwards. Why not disclose it in your opening posting or anywhere on the website for that matter?