Here are the terms for an Exhibit 10 contract, courtesy of Yahoo Sports:
"An Exhibit 10 contract is a one-year, minimum salary agreement that isn't guaranteed. It can also include an optional bonus of up to $75,000 that will be rewarded if a player, after he's waived, spends at least 60 days with a team's G League affiliate. This makes the Exhibit 10 contract a helpful tool to bring in players to compete during Summer League for a roster spot on an NBA team or its G League affiliate. Each team can have up to six Exhibit 10 contracts at a time."
https://sports.yahoo.com/exhibit-10-contract-nba-explaining-100803668.html#:~:text=An Exhibit 10 contract is,a team's G League affiliate.
It is hard to keep up with all the moves, but ESPN currently lists five players without salary: Boogie Ellis, Terry Taylor, Isaiah Crawford, Isaac Jones, and the irrepressible Mason Jones. Of those five, Crawford and Isaac Jones are two-way players. Correct me if I am wrong, but they can still sign one more guy to a two-way contract. I was surprised to realize that Orlando Robinson has a regular contract, as does Colby Jones, both for just over $2 million. Alex Len,
Jordan McLaughlin, and fan favorite Keon Ellis also make just over $2 million. What a steal! (pun intended).
https://www.espn.com/nba/team/roster/_/name/sac/sort/salary/dir/asc/sacramento-kings