It's just an example of the Running Gag trope.
Unfortunately, in this case, they picked a song you don't like....
Additionally, the song showed up in Warehouse 13 which indicated that the two shows might exist in the same universe...essentially, an Easter Egg for fans.
In fact, we know they share a universe as characters cross over series from time to time.
Could they be getting their money's worth having bought the usage rights? Sure...but that's just plain business-sense.