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The min withdrawal is 400k satoshi.. if you refer enough people who keep playing or keep claiming on the faucet you could get this every week.

Depends on your goals. I have been doing internet marketing for about 15 years, thats how i earn my money so i am onto these things like a pitbull on a poodle :P

If you want more bitcoin, yes start getting referrals :)

Actually i noticed in your post too.. your first link Bitcoinker doesn't have your ref url in it, might wanna fix that :)