Amazon Prime Changes

We have been a Prime seller for a while now and have done very well from this since we started, recently Amazon have changed their terms and conditions so that you now have to have a later cut off and also open either a Saturday or Sunday. So for the moment we are no longer a Prime seller as we currently don’t open weekends do people think its worth looking at changing this or would they say its not worth it due to not a lot of lost sales as they no longer do Prime?