As a newcomer myself, I'm asking myself two questions:
1. is it vulnerable to DDos? Anyone could simply create a gigantic amount of pub keys that would post gigantic number of comments, masking any "genuine" message in a flood of bot-generated noise
2. is there any kind of gossip in place between relays? Or do you just have to hope that relevant content will be posted to the relays you are subscribed to
Paid relays are a way to overcome the DDoS attack.
You'd pay on writing, not reading, right?
Yup. Most (if not all) paied relays are free to read.
And there is no chatter between relays at all. There are some ways to get one relay to push info to another but thats not default behaivior. (Blastr is a good example of this) IMO its better that way.
How do you decide what relay to follow? It's a pretty impactful decision then
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