If you open LTK links in incognito

[awfulapril]

Does this mean they don't get the commission?

No, they still get commission. If you want to make sure they don't get commission, there are ways round it

Go on ...

If you've clicked on the ltk link, copy the URL, close the browser window and delete all cookies/cache, then paste the URL in a new browser window, delete everything after the question mark (?), then load. You should be good to go now 👍