You earned 0.5 in two days. 0.5 what? I don't want to assume that you meant 0.5 bitcoin because that may not be true and if it is, then you are on your way to becoming a millionaire. For that reason, you may not be interested in sharing your secret of sharing a referral link.
At the time of this thread, BTC is reaching 20k USD, I dont think anyone earning 0.5 BTC per day spend their time to share for community, instead of making more money than that daily amount.