Well its really hard to timing those big time refferals since i really believe that there are many people doing some extra efforts to get theirselves an affiliate bunos, and it could be bad if people will referring some hyips since they are putting their invites on danger, and if you targetted on gambling sites well thats totally ok, and i think you can gaim some refferals if you give some little giveaways and tips for them to play.
inviting someone to be your refferal especially if it was directing to gambling sites could be really dangerous especially if the one who you've invited know nothing about gambling and if they're losing they will always blaming you and accusing you as the one who inviting them to play these games,really not encourage it honestly