Doubt that this will happen. Im not sure about freebitco.in but having more than account is not allowed in many sites, let alone if you try to claim the referall bonus by using more than 1 account. Highly doubt that all those high roller on the site will be risking their account and deposit trying to get tiny rakeback from wagering
P.S : VPN might do the trick though 
There is nothing to doubt, that will happen surely. For those who know that the amount of money they will invest is large, they will use affiliate programs to get automatic income for themselves. For those who know that the amount of money they will invest is large, they will use affiliate programs to get automatic income for themselves. Even for websites that perform verification, it can be easily bypassed.
It really makes me feel feel regret that I didn't take advantage of it. If I look back at my BTC sale history, I sold a huge amount in my country, while 5% was the reward for the affiliate program. But I ignored it

I'm silly