They should actively look for interesting accounts to recommend. If they asked people would also help. And they could include more accounts which aren't just Bitcointwitter2 rubbish. It's not actually all that hard.

The list they have actually puts a lot of people off. Same with their sidebar.

If you look at that sidebar you'd be under the impression this is a bitcoin telegram group.

And although that might be true, it's a bad impression and a feedback loop.