Thank you. I managed to look into the issue and found something regarding this. I'm using ImportWP to import my products. As you can see in the screenshots it automatically cloaks the URL's from the offer URL uploaded to an internal URL when uploading through ImportWP. For some reason last time it did not cloak all of them, but only some. That's also what caused the issue with adblocks viewing them as ads.
Just got one more question about link cloaking in combination with ImportWP.
Yesterday I did the full upload again and it looks like now all links are cloaked correctly as how it is supposed to work. It looks like it automatically creates the url in the following format: internalurl.com/go/PRODUCTID-OFFERID which is fine, but officially according to the affiliate platform I am mainly using it is not allowed to use link cloaking as users can't view where they are going. Is there a way to disable this or change this formatting so the link not only has numbers but I can for example make it look like: internalurl.com/go/ANWBcamping/BoerenBed-De-Lange-Weide (better trackable for my customers where they are going by inserting vendor name and vendor location) and therefore I think my affiliate platform will have less complains because it does not look like you're tricking customers into clicking weird links.
Do I need RH link plugin for this or is it simply not possible right now when using ImportWP to import products?
Thanks a lot for your help again! It makes me understand much better how ReHub works.