There is no annual performance review process. Anyone who gets a raise has received one as the result of a challenging exception process that requires multiple executive signoffs.
In other words, raises are very rare. Most staff continue to receive their initial base wage idefnitiely, for mutliple years, before even being considered for an increase. In my view, this is a fundamental failing of the company, as it is a mighy strgully even to keep pace with normal increases in cost-of-living.
Promotions are even rarer than raises. They do occur, are extremely infrequent, particularly considering the success of the company and the contributions of the individuals.
It is not clear whether the above issues will be resolved in the coming months and years.