This tab is actually something namebase can do without. This encourages "name farming" at a very serious level and can defeat the vary purpose of this concept. This feature ensures that any one with muscle power based on money can outbid someone who may have thought of the sitename. In fact its so bad at the point there are keywords available as .com names on godaddy after 20 years of internet but are sold out on HNS in a few months.
While it possible to find out whats ending soon on the blockchain directly very few users are tech savvy enough to know all of that, and even lesser number will be interested in name farming.
But namebase is a common man friendly portal. The ending soon tab is fatal. My recommendation would be to remove it. Else we will have a few whales squatting on all the names.
There is a market place options. Also users can search keywords. These two functions will ensure openness and transparency even if we remove the ending soon button.