My original content was reposted by someone else and took my revenue?

I'm an amateur game add on creator for a popular game called Minecraft. I create texture packs to alter the game to whatever theme i decide to create. I have my very own page where i post photos of the end result and provide a download link to get it.

Before the person gets the free texture pack they have to see an ad. For every ad a person watches I thecreator attain a small amount of money each time.

I noticed though my downloads from media fire were much much greater than my ad views and this was very odd. I did some research and i noticed a major texture pack website stole my texture pack, gave me credit, and posted my download link only, bypassing the ad link.

Not to mention this texture pack website gave 5x the traffic i was getting on my own. What can i do to stop this from happening?

Hire an attorney to write a cease & desist letter

You can find out what page a click comes from. (Sorry, you'll need to ask someone else how to do this, but it is not hard as every internet transaction says where it is from).

'So put code into your link… If the click came from YOUR page, download the pack. If the click came from anywhere else, put up a page to say sorry, this can only be downloaded from (link to YOUR site).

edit: go and ask in the Computers&Internet - Programming section, how to write the code into your page to discover the "referrer" the request came from. All you need to do is say "if referrer NOT (your own site) then show the page that sends back to your own."