Update on Warpcast home feeds

Based on feedback, we've:

- Turned off recommendations (since a lot of them were spammy rn)
- Turned off replies + reply bumping
- Tweaked the algo to de-dupe recasts

Please let me know if things are better or worse!

Invited 3 people today all joined but are not happy with the fact that they were automatically following ~70 accounts upon sinning up

https://github.com/o-az
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https://x.com/awkroot

The alternative is a pure algorithmic feed.

Much easier to start with a feed of people who represent the best of the network and unfollow.

We tested both and auto-follow users stay around at a much higher rate. (People are lazy and don't follow enough people.)