Wonderful heatsink design and they give you rubber bands to tie it. And they are ugly as bonus. Why not give zip ties if you wanted to cheep out? Another great design ruined by accountants. Like their goal was to fail. And they do have lips on the side for clips like EK, and Aquatuning.
Yes, it does look a bit tacky with that implementation of the rubber bands.
Far more compatible solution than the fan blowers though, which with the small diameter of the fan I can't see being quiet with any moderate throughput.