The way I see it is MG, Walmart, WU and the traditional walkin/online presence US based money transfer businesses will try to go on business as usual and they will be fine for about 2-3 years.
But…the online international based and US based remittance agents will take notice of ETN or their competitors who already have and will adopt ETN, in the beginning slowly, then it will snowball.
You’ll have a majority of the online based services using ETN and capturing more and more of the market share until WU and MG have to make changes or die.
I could post a list of online remittance agents not named MG or WU, you’d be surprised how many there are out there.
That’s not mentioning the local vendor/agent remittance partners who will pop into existence in the next year or two because of ETN.