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That's not how it works @vynchy. You don't just hire people and they work. People need to be hired and trained which is going to take a significant amount of time. You also have to consider the server upgrades that may affect the website. I used to work in data centers, and scaling projects could take hours, if not days.

There are tons of security issues that need to be thought about as well. At the companies I worked for, there was only a certain threshold where we could come in and upgrade people's systems because of business hours. However, these exchanges operate 24-7. How do you scale a system like that and keep it running at full speed?

Thanks and true you made some good points i agree

They can ... but not fast enough! - It really is hard to deal with such exponential growth!

But they certainly want all our business so will be upscaling as fast as their budgets allow!

I agree with you @icedrum. It's not that they want to shut out the world. It's they won't be able to operate if they let the world in! The downtime is necessary for scaling purposes. Businesses can't just expand at the snap of fingers.

You have never ran a business right? They have x amount of staff and have recently seen a huge wave of people coming to their site. It's like 100 000 people a day. Even if you have millions you can't get new competent staff for a few days. Also stuff like passports is sensitive data at least where I live. You can't have any random dude checking them unless you want a few identity thefts coming from your exchange.