Depends on what link you're posting and why.  I've given merits for posts that don't contain much more than a link, but those have been cases where the link is a very useful piece of information.  Someone posted a link to some kind of death toll counter for the coronavirus, and I appreciated it and thus merited that post.  Is that merit abuse?  Absolutely not. 

Merit-giving is very subjective, which is why I don't tag suspected merit abusers--there's way too much subjectivity involved.  And OP's comments here seem more like jealousy than any real concern that the merit system might be getting abused.  I would suggest just moving on and not letting it bother you.  Even if there is abuse going on, it isn't likely anybody is going to get tagged by DT members anyway.  It's not worth the mental stress IMO.