I don't see why they couldn't just negotiate a bonus through employee stock options. While I personally disagree with the use of options and refuse to use them myself, just keep in mind that GAAP (Generally Accepted Accounting Principles, the standard for all US [at least] accounting), doesn't list options as expenses, as cash or stock bonuses would, thereby increasing the profit margin, raising the stock price for executives (assuming they own stock) as well as the options gains for employees. Everyone would win, wouldn't they?
Well, maybe not. If the stock price took a hit, it would be Activision coughing up for the counterparty, whereas if paid in common or preferred stock, they'd keep their money, and if employees sold, it would mean less money is turned liquid for employees.