Bates said:
Where would I find such numbers? I highly doubt based on the number of commercials Matthews is in that he isn't generating at least a million a year, that would compensate for the lost tax dollars.
cabber24 posted a link to an article that contains some information on endorsements. Only 3 players on the list earn more than $1M in endorsements. Also, I believe it would take significantly more than ~$1M to cover the tax differences. Otherwise, I can't imagine Stamkos would have signed for $8.5M per year knowing he could get $10M+ in the UFA market + close to the same endorsement numbers that Matthews gets.
Also, keep in mind, the only real national commercial Matthews. The rest are almost all local/regional, and they come with a much lower budget for everything, including endorsement dollars.