Those hit the same issue, given they are just linking to various sources, each with a paywall.

At least Google News and Artifact lets you block sources and with Artifact it understands paywalls, so stops recommending you posts after a while.

The one thing both of them are missing is the ability add a new source. E.g. if I stumble upon an interesting blog post or newsletter, let me add that blog to the mix, but use the same algorithm to incorporate the post intelligently into the algo feed.