If it's not instant either the hardware isn't good or you didn't register the fingerprint properly. Also the fingerprints stay in your device and never get sent to any company.
Because the entire point of the vote is to make people feel part of the event. If a mob doesn't get added, its functionality will be added to something else. One example is the grindstone, which took the functionality of one of the 3 mobs of the original mob vote.
And I'm European