“While content on Lens may include an on-chain transaction, the content data is linked to a data availability location” … so Farcaster Hubs? 😅
It's honestly a bad architecture - you have all the problems and costs of writing to blockchains and none of the benefits of them. If you're going to make people do on-chain transactions, put the whole thing on-chain so the devex is great, don't use unreliable pointers to off-chain stuff.
Tx data is submitted to Arweave (using Bundlr) for data availability, which is much cheaper and faster than using polygon. Data availability guarantees of Bundlr /Arweave >>> than Farcaster hubs, since hub network is not actually BFT. Smart design choice imo