!showerthoughts
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Let's say 99.99% of the World's population had not heard of them before this happened, and I think those numbers are very generous.
Does anyone seriously believe that after this event only 0.01% of the World didn't learn about them?
You're taking showerthoughts way too literally. It's an exaggeration. The number didn't "reverse" but it definitely multiplied. Businesses were impacted and who works for businesses? People who probably never heard of cloudstrike until it shut them down. It grounded flights and every person in an airport since then have probably heard the name. Anyone with a news app on their phone probably got a notification and know the company now. The number has drastically increased and that's the point, not that it specifically "reversed."
Not only is this showerthoughts, as you pointed out, but the person posting never provided numbers for those that were previously aware of crowdstrike. Any attempt to do so by those responding takes the statement beyond it's intention.
Does anyone seriously believe
Yes. My assumption is of course that this shower thought is presenting a numerical fact, and that everyone upvoting believes it in a literal sense.