Not trying to sound preachy, nor is it my intent to question the OP's choice. Just wanted to share what I found when I looked at OBD adapters a few months ago. I'm guessing the only difference between the vLinker MC+ and the OBDLink LX+ is transfer rate. And under our Triumph-specific use case, maybe not even that. See post #39 at this
link for an interesting comparison of test results between the vLinker MC+ and the OBDLink MX+ (the MX+ is an upgraded version of the LX+). The cliff notes version is that there was no difference in performance between the two adapters except for one esoteric automotive-based test ("proxy align") for which the vLinker was slower (60 seconds vs. 20 seconds). I've used the vLinker MC+ to reflash the ECU's software on my Thruxton and it completed the operation without any drama. The OBDLink adapter could conceivably have done it faster, but a few seconds wouldn't seem to be worth the 2X difference in price (at least not to me).
I've looked at the EBay auction for the reduced price OBDLink LX+ (just search EBay for OBDLink LX+ and you'll find it; it's on both the US and the UK sites). The OP as well as a few others here have reported that it works fine, so there's that. But there are a few red flags. The auction description says "Does Not Apply" in the 'Brand' field (why doesn't it say OBDLink?). Manufacturer's part number is also given as "Does Not Apply". There's also this: "The item may be a factory second, or a new, unused item with defects". None of the other competing (and more expensive) auctions for the same adapter say this.
As
@andymath138 says, it's probably just an older model purchased via a liquidation, but if so, I'm not sure why it wouldn't be stated as such in the auction description. If I knew for certain this is a genuine unmarked LX+ that's a few years old but which can be brought up to date with a firmware reflash, I'd be all over it. But the auction seems deliberately deceptive and that gives me pause.
This is probably all splitting hairs, as I guess it doesn't really matter if it's genuine or not so long as it works. And it apparently does. I have a hard time buying pre-owned clothes, too, so this could just be a me issue. The chance that that pair of jeans used to belong to a serial killer is just too much for me to disregard. The inexpensive vLinker works fine and knowing that Ted Bundy didn't own it before me gives me comfort
Maybe
@andymath138 can update this thread if anything changes regarding the future reliability of the cut-price LX+. And since you've used both adapters, it would also be interesting to know if you perceive any differences between the two (speed, etc).