And wording of that tweet is vague, it doesn't say Authy confirmed anything, just that "reached out to help confirm". Hopefully their help will be along the lines of "here's contact info for CEX and Coinbase, give them a call"
If I was a high-profle client like CEX or Coinbase and I heard that one of our vendors for security was going around telling other clients how we are being outperformed like that I would be pretty pissed. Especially in public and would strongly consider taking my business elsewhere to a place that doesn't have such loose lips about our business with them.
If these statements are true, as a user of Authy, I find it very disturbing.