1. Agreed, I'll likely hide them by default. The results from Gayot/Eater are incredibly noisy, and I doubt most people are interested in seeing restaurants from Gayot's "Top 10 dog-friendly date brunch spots this holiday."
2/3. I was experimenting with numeric pins but have now switched back to pins which vary by size depending on the restaurant awards. I also increased the pin count to 50 by default. Can you try it again and see if it feels more intuitive?
I see what you mean now. This has become an interesting experiment in UX. I updated the platform to leave any previous pins on the map (even if they're no longer in the top 50 results). Hopefully it works better now!