I'm not sure if this is really the case. There was already an effort underway to repeal this through a vote by the citizens. This seems more like the city council heading off the vote to save face.
Amazon might be the loudest employer, but they are not the only employer impacted by the tax. The person leading up the signature drive isn't even an Amazon employee:
https://www.linkedin.com/in/james-maiocco-a9520
This would be a vote by all Seattle residents to determine the need for the tax. Are you saying that Amazon is going to somehow rig the election?
I'm just pointing out that it's interesting that the day after articles started coming out that the signature effort was way over their goal of getting this tax on the ballot for November election the city council decides to vote on a repeal.
https://www.king5.com/article/news/politics/head-tax-repeal-...
Amazon.