I am an author for these guys. I sell stock music thru them. Here's my problem - these guys have a rejection system set in place that goes as the following when you submit a song:
Soft rejected: This is when your track has minor flaws & they will suggest you how to improve it... therefore it is temporarily rejected until you fix the errors.
Hard rejected: This is when your track has many critical errors or there is simply not a market for it. If your track is hard rejected you cannot resubmit it.

The problem I have is that they tend to hard reject songs simply because they are too lazy to figure out the minor problems with it. Matter of fact, some of my tracks were amazing, but still got hard rejected without explanation. They will hard reject it but say they don't have an explanation. If it was rejected, then there must have been a reason for it... but how was it not stated? This is very questionable & therefore makes me wonder if these guys are just being pricks. I try to produce something different but they somehow wanna stick to the same old crap. You notice this because most of the songs on their site, sound the same. It's the same old sounds: ukulele & whistles & glockenspiels with a piano overlay, with some claps. Or it's guitar harmonics music (like in corporate commercials). Yeah it's what sells but allowing new trends to be followed is not always a bad idea.
Then when I wanna go back to try & find a song I once found on there in 2014 but I never purchased, there is a 60 page limit for searches. What is the last item on the 60th page in your search, is the farthest back it will go. So it only went back to 2015 because of such broad search functions. This is a shame because that means they're not showing you everything when you're searching for the perfect track.
I wouldn't recommend this site. Matter of fact, I'd highly advise staying away. Try premiumbeat.com. They have a smaller catalog but they have some NICE tracks for your commercials. You'll be in heaven... because they know quality is better than quantity. Audiojungle tries to emulate that but in turn just shows tunnel vision ignorance. Trying to sway you in their own direction. Yeah that's business but over time they hurt themselves with this.
So yeah... premiumbeat.com is where I'd visit if you want stock music that doesn't stink.