1. What 5%?
2. You don't need my service, don't post.
3. Referring yourself is against the site policy. You will get simply banned with your coins in or out of it. If you have been paying attention to this forum, you must have seen casinos (win88 is the most recent one) banning users for doing that. Most will not be public. And sites usually have a zero tolerance policy in such issues since such behavior will reduce their profits.
There are multiple ways (like bitcoin addresses) other than the ip that they check to confirm it.
VPNs: Unless you are sure that no one else have created an account with it, it is the same result.
Find one site that states referring yourself is not allowed and post it here.
PD "apparently" has this rule, easily bypassed with a proxy or VPN and a subtle username. Not that hard at all.
As for any other site, I'm sure the admins quite frankly don't give a damn if you refer yourself and get 5% of your loss back, they still have the 95%.
And another point, why would we want a percent LOSS if we can still get what we wager back even if we win?? Should be whole wagered, not amt lost