We understand why people may want to do this, but there are good reasons why we don't allow it. RapidFunnel is designed to be a person-to-person, permission-based marketing tool.
The primary issue is that we don't currently have a way to keep people from abusing a bulk import function, if made available. We know most users would connect with each person on their list, before putting them into a campaign. Unfortunately, some others may simply go through each contact in rapid succession and assign them to campaigns, instead of doing the work to contact them first. If even a few users did that with a large number of contacts, then our SPAM complaint rates could climb rapidly before we could mitigate it, which would negatively impact every other user in the system. We currently have a greater than 98% delivery rate for email and we want to protect that for everyone.
A bulk import feature simply opens too many opportunities for abuse. Any abuse of that nature would negatively impact all users. If we are able to find a way to prevent the abuse of a bulk import feature, we'll revisit the idea, but at this time, we have no way to do that.