Would be neat if someone built a tool that:

1. Looks at all the accounts I interact with and follow in a given week
2. Surfaces the top 3 most "underfollowed" accounts
3. Sends as a direct cast on Fridays

I'd pay a few dollars a month for this service.

How would they determine which account is underfollowed without bias?

Meme enthusiast | CS Major |  I like shoes | Shitcaster | Anime

Taste might be bias but it doesn’t work well in all cases. Especially when everyone else is being subjected to it. 

Couldn’t the builder be able to automate it so it’s free from any human intervention and just follow your casts for the previous 6 days before Friday?

bias is not inherently bad. taste is bias.