If someone sent any link or post that is from that Mastodon instance and it went viral, the entire instance will be sent to the ground and out for hours, making the post unavailable to be viewed.
The worst part is journalists and the media have to be told that posting a link from a 'small niche community' on Mastodon will send a flood of traffic that will knock it down offline also giving the impression to others that it is not ready for mainstream at all or even ready to onboard on tens or hundreds of millions of users, daily like Twitter.