Also, it is a myth that when you pay a premium for a rebadged product you are paying for the support. This may occasionally be true, but it is not in general. Because the design, manufacture, and testing is done by a 3rd party, chances are there is nobody at BK / Extech / Tektronix / whoever that even knows how your product works. Some technical manager just picked a couple of items off a menu and sent a logo and color scheme choice to the OEM. Technical issues beyond "have you read the manual" and repairs will be sent on to the OEM. If you are lucky, they will at least have some units in stock to do an exchange for a defective product, but don't count on it.
It isn't that these companies don't do a service: selecting reasonable models with good specs written in engligh, arranging international shipping and payment from china, and facilitating returns and exchanges. The problem is that these are the function of a distributor, not a manufacturer. I would much rather they just left the original badge on the product and sold that.