I keep trying to use the service with my eBay account, and I go through the whole process--right up to getting a green banner that says I'm authorized.Then when I try to create a snipe I'm told again thatI need authorization! This is VERY frustrating.

Hello Jessie,
Thank you for your question about your authorization. We just updated it manually for you, because your account was created before a certain software update we issued in February 2020.
Please try again: https://bidslammer.com/signup/
If the above does not resolve your issue, please let us know, and we can take the next step. Thank you for taking the time to write in.