The NFL MVP voting system consists of 50 media members, as selected by the associated press, choosing a first-fifth place vote for MVP (with different points given based on their ranking 10/5/3/2/1). So there are 50 total first place votes possible to give.
This question asks only how many different players will receive a 1st Place vote (which could not necessarily be the player than has the most points and wins the MVP).
Results from last year:
https://www.espn.com/nfl/story/_/id/35626954/chiefs-qb-patrick-mahomes-wins-2nd-career-nfl-mvp-award
This question resolved based on the votes last year would result in the answer "3", (Mahomes had 48, Hurts had 1, Allen had 1).
Feel free to add a higher number than 8 if you want.
Other Fun MVP Markets:
/JoshuaWilkes/who-will-be-the-2023-nfl-mvp
/StopPunting/what-player-will-manifold-consider
/StopPunting/which-nfl-quarterbacks-will-receive
/StopPunting/which-5-players-will-aaron-schatz-d
/SethWalder/will-a-nonquarterback-receive-at-le
1,000
3.00@StopPunting both conducted by AP.
NBC article in 2018: "The same 50 media members who vote on the All-Pro team vote on the MVP and other postseason awards, so the same thinking that shaped their All- .."