Getting referrals I see it as no big deal. If you get a got spot to introduce your referral link to with much focus on or a community you have built for a long time before now then you must be able to achieve it because your community would definitely key into it since it is coming from you.
Referral work is very profitable for those who have good favorable community. Referral is a profitable business if it is handled properly. Those deal with referrals must try to follow the proper rules. But there are some promoter who try but it is only considered a waste of time because it is not properly. But I certainly don't underestimate the work because some of the referrers get a large part of their income from link sharing.
When it comes to sharing of referral link for registration, I believe you have to know the right place to put it in so that it would gain the attention for which it was meant for. For instance, You can not put a gambling referal link in a trading community as that does not correlate. Although there might be some few but the traffic would not be as expected. So this just need a smart move to do to gain more referrals.
Of course, if gambling links are provided on trading platforms, it will be meaningless. Because a trader will never go to a gambling platform and gamble. Any such work can never be successful.