Some uses are benign (testing servers), but many are deceptive or abusive.
At first glance, using bots seems dishonest. But many server owners argue it is a necessity. This is known as the Seeding Paradox. Fake Players Fivem
A serious RP server advertised "500 players." A streamer joined. He found 80 real players in the city... and 420 fake players standing in a single nightclub. They were all identical models in default clothes, staring at a wall. The server lagged horribly because the CPU was trying to manage 500 connections. The streamer quit in 10 minutes. Some uses are benign (testing servers), but many