Not sure if you can define it as a abuse (or some would likely argue here), but the current system is outdated and are practically encouraging price dumping. And that is a major problem which will not decrease in the future.
Also every time this topic is discussed, more authors are “inspired” to try this golden Willy Wonka ticket to get trending or sail into the popular files list giving their tracks away for free.
We are not allowed to discuss prices, but there is a pretty obvious “gentleman agreement” in the search engine of what pricing you can try if you want to raise the odds of your track trending. I suggest sending some moderators down the search engine, keep things civilised.