they can combine hashrate, so you got one bitcoin address and many workers. but the bitaxe is mostly only for lottery mining. if you would mine regular with a pool you would have to much expense per TH because the bitaxe is expensive compared to an S19 miner where you got a lot of chips inside. one bitaxe uses only 11 watt and normal miners about 3000 watt. so the group of people with interest are living in high energy cost environment where you cant mine with profits