Looks like an Amazon exclusive.
I have an E Mail address on the Tarptent site.
Because of that , every few days I get another E Mail or two from another Chinese manufacturer wanting to supply us with tents.
You just pick the shape and colour you like, order 500 or 1000 and you have another tent with your name on it.
Tarpent does not do that but a lot of brands do.
BTW, the first MSR product was a stove.
In 2000 MSR merged with Edgeworks who at the time made tents for Moss, Walrus and Armadillo. Those three brands were then discontinued with some of the models becoming MSR tents.
Most brands don't make their own tents in house so you have factories that make several brands side by side.