Look at the $ per click and include those fees. Some of the criminals running programs have shitty credit and banks and are charged fees to send checks.
Postage isn't free if they mail it themselves.
Some companies use payroll services.
If it is a small sponsor, they might send out 20 checks a month. Not exactly $1000's of dollars, eh?
Epass charges $2 per business transfer, not to mention wire fees.
But yeah, some sponsors are shady as hell and shouldnt be in business in the first pace.
Be thankful for the sponsors that do absorb banking fees.