This is going to would really strange....but here it goes.
First Mercer cannot force you to run their plates. With that being said.....it's a better deal to use Mercer plates. They take care of all the IFTA. No hassles. All you need to do is buy cheap fuel without sweating the IFTA BS.
Could I get Missouri Plates and deal with where I should fuel, paperwork, milage tracking and all the other headaches that come with IFTA.....yes.
Or would I rather run Mercer tags and all I have to do is buy cheap fuel where ever I want.
I opt to run the Mercer plates......much better deal.