Personally using WirexApp for such things. Very good service with all features you mentioned. Here the link with discounted plastic card:
Wirex card is free to order, so what discount are you talking about? It used to be discounted if using referral link, but not anymore since it's free.
I hope that no one will use your referral link, as you are clearly fishing for referrals a.k.a. free BTC with false information.
1. I didn't know that now cards are totally free since I ordered it long time ago. But I am sure that registration from invitation gives some benefits for both sides. They always gave bonuses for those who registered from friend's link.
2. I helped topic creator with advice so that's absolutely normal if he will use my friend link as gratitude for it.
So I don't see any issue...
