I wouldn't pay any attention to what newspapers are saying about any player's wages for ANY club, let alone United. These journalists know surprisingly little about professional footballer contract negotiations.
For starters, any footballer of note that is expecting merchandising sales to take off will NEVER want a flat fee for his image rights, he'll want a percentage because there's more money in it for them. Secondly, the merchandising and commercial deals will be separate entities because merchandising will be tax free and United/player related commercial deals are taxable.
And finally these newspapers have added a vague 'bonuses' onto the total too, and for those bonus figures to be included United have to get a top 4 place, trophy wins etc.
And even if all of this nonsense was true, United can afford it because they have over half a billion quid in revenue coming every year.
And yes, we could have got him for free in the Summer but why leave things to chance?