The rule has to be made, and the line has to be drawn somewhere. I think cards should only enter the Reliquary if Zanz says they influenced the cards introduced into the game.
New cards are added to the Crucible every day.
Every update, more ideas are exhausted and put into cards.
As time passes, new ideas in the Crucible and cards designed by Zanz will become more and more similar to cards already in the game or crucible/forge archive because the amount of possible unique ideas will run out.
Eventually, more and more of Zanz's ideas will be similar to cards in the archives or polls even if Zanz has never seen those cards before.
Finally, after enough updates and time that has passed, the new cards will all look similar to something that already exists.
So should we give recognition to everyone who just happens to come up with an idea that Zanz also happened to come up with? I think not. In the future, dozens of people would claim they have a card that influenced Zanz just because they created a similar idea by sheer luck. Is this what we want to award? No, we should award the people who directly influence Zanz.