Sure it was sponsors money but i'd still guess his previous Hyundai contract was a lot more lucrative than his year at M sport.
My guess is Sordo doing some events (especially now that Portuguese info is saying that he won't run in Portugal again) and some other "young" driver sharing the car. Suninen looks like to be in good...
With Msport it was Red Bull that paid his salary not Wilson alone. At least this is what I have understood. The same was with Ogier when he was in Msport.
You can get this turnover info even on the paying country level from the public Estonian companies registration database. Figures I posted are valid.

Sordo and Jon Armstrong would be a great option IMO. Yes I am biased but Jon has the speed and youth on his side. He did very well in the ERC this season with an aging Fiesta. He is talented. ...
Hyundai WRT