Today is the last free practice ACBL tournament before the Fall 2019 NABC Robot Individual tournament. Log in and go to ACBL World to find it, NOT Robot world, even though both worlds are full of robots.
Normally you need to pay $1 per day to rent an advanced bot on BBO, or $1.35 per day to play a 12 board tournament against advanced bots. They are stronger than the basic bots, which are only $1 per week to rent, or free when you challenge a friend. A few lucky and skillful winners in the practice tournament will earn a free entry to the Online Individual, a $40 value (or $34 if you are a repeat customer returning competitor).
According to the CEO of BridgeBase, basic bots perform better than about 90% of human players in the daily daylong tournaments, and advanced bots perform better than 97% of human players. Log in and give it a shot!