Just having those emails in hand would be almost a voucher for negotiating higher salary when looking for another job, they certify that you were one of the people that were vital for Twitter to run.

There’s likely no negotiations. More of a “could you come back please?” And you either accept because you don’t have anything lined up or tell them to go pound sand

Well, if they are indeed that important to the company, then they do have quite a large leverage.

I'm 99% confident that anyone with Twitter on their resumè will have no problems landing another job.

100% confident that anyone who are called back because they were essential will have absolutely no problems

Being asked to go back just means it's cheaper to get you to return than it is to recruit someone to do your old job.

For software, the existing employees will always be cheaper. It has been argued that an engineers value is captured most in their mental model of the system. EG: Want a new feature in a system I built and maintained? Boom, here are the touch points, the gotchyas, and here is the roadmap to get if done in three days. Anyone new to that system will first say, cool, give me about 3 weeks to learn this code, and then maybe another 7 while we implement it and work through all of the trip wires we did not know about.

And firing them was just an insanely dumb thing significantly increasing expenses.

> Being asked to go back just means it's cheaper to get you to return than it is to recruit someone to do your old job.

Only at your old rate.