Spambot creates 4000 orders a day
Blocking is hard. Honeypot is a good deterrent, but if you allow anonymous users to click links that add products, then having spam orders might be your new reality. Removing useless, old carts is easy.

We use Commerce Cart Expiration on a number of stores. Also, sometimes its preferable to delete orders outright based on some criteria. For that, you can use Commerce Order Cleanup utility module.