The consensus here is trivial to control by the strongest of the group. What if when Hugo sent the 200 coins, he said “oh we’re allowed to generate 200 coins if it has been over 3 days of no coin generation” and his statement would be impossible to verify because:

1- They have no way to get in touch with the central authority, the developer (author of the blog post), who can tell the users if the new consensus rule is allowed or not.

2- They have no written account of the consensus rules, which would help to at least invalidate new consensus rules that seem to conflict with the written ones.

So what would happen if Hugo did this? Well if he’s the strongest of the bunch, he could simply impose on the group and say “this is a new consensus rule, accept it or else”. So much for decentralized consensus!