A longer thread with problem statement and reason. 

Eth charges fees to protect against ddos and lots of similar precedent in tradfi. So eth never "goes down" or is "too hard to sync" in practice. Fees are more palatable because there is expectation of profit per tx. 

For social media, there is (usually) no expectation or profit or precedent for a paywalled app that succeeded. It seem inevitable that we need at least some upsell for users to get in and contribute before we can charge them. 

But we can't also let the network go down or get congested, because then no one can build apps.

Just do it.

Nobody is going to fork Farcaster, and it looks like this has been offered to big partners as a way to expand the network.