The report goes on to state that the $300,000 base pay is similar (if not the exact same) as to what Cavill agreed to be paid when he originally signed on for Man of Steel, and it’s something that is becoming increasingly more common with these franchise films.
After all, it’s a fair amount of compensation to start with for any entry-level actor signing on to a franchise of this magnitude, and as the franchise gains more traction and steam, this gives the actors a chance to make more money as time goes on.
This pay strategy is something that Marvel Studios perfected with their Marvel Cinematic Universe films; starting out each of their actors with a respectable base pay, and then allowing them to negotiate for higher paychecks as they starred in more films and their names became more valuable to the studio.