Hmm, okay. For others that come later in search of information, I'll address some of these.
> ... one way it can be stopped.
Yes, this newbie developer made some decisions that couldn't scale to 1B users. Alternatively, each node can serve static assets, thus scaling linearly w/o CDNs. This isn't required for most apps, as they aren't targets for state-level actors seeking to deplatform them from CDNs. But, if a totally free client self-hosted app is desired, this is possible.
> ... None of the blockchains have the required throughput.
Obviously. That's why "this is new." Blockchains enforcing global consensus on a "total order" of unrelated events cannot: the laws of physics forbid it, besides it being wasteful and unnecessary. Holochain does not enforce such unnecessary "total order" consensus; it is not necessary, as it turns out, for maintaining state consistency in distributed systems. That is the breakthrough. This is a low-research "Bro" comment.
> ... can't even link to ... it because "someone needs to pay for hosting"
Ya, I was just being considerate. It's a newbie's app, hosted by a few people.
The point is, there is something new going on here; something that some hackers on HN might be interested in. I know the 2018 "Me" would have been interested!
If you're not, that's fine - carry on! However, no more low-research "Bro" comments, okay? ... Ah, I see that you are rabidly anti-Crypto, and that's fine: fill your boots! But, for those visitors who are interested in amazing things, don't be discouraged! There are indeed new things happening here that are worth investigating.