You'll smile when you read this because you know it's true....
 
http://www.savingcountrymusic.com/florida-georgia-lines-anything-goes-is-the-worst-album-in-the-history-of-country-music
 
 
worse even than the Taylor Swift albums?..... hummmm anything's possible I guess.
 

Dude seriously didn't like the album. 
 
I almost said that they could have used a room full of monkeys with typewriters (apparently, it took up to 5 song writers on a single tune too produce some of their drivel) but then he brought Nickelback into it.
 

Is this another sub-genre of country music?

Mix country and rap and you get...... "CRAP"
 
In a band I was in many years back.... someone in the band early on....as we were looking for a name.... said....  hey, since we play country and rock,  why not call the band KRROCK... Get it?  country and rock.... and somehow, the rest of us thought it was nothing short of brilliant.....lacking any better ideas for a name on that particular day....  and so it was duly named.  I'm sure it doesn't take a big imagination to realize all the jokes that name elicited from everyone.... bar owners, other bands, and even club patrons.... all of them had fun at our names's expense... but that was one money making band.  We used the double "R"s in there hoping to avoid the obvious connection..... but that didn't really work.

I was thinking more along the lines of a county being a sub-section of a country so county music must be a sub-genre of country music...
 
I guess it's to early in the morning.

Prior to relocating to MN and with the exception of Johnny Cash I never listened to Country.  After moving out here to the upper Midwest I have discovered that folks take their country very seriously and like rock, the different styles within the genre have very serious followings and (at least from what I have observed) the divide between the fans of the different styles is pretty serious bordering on crazy violent.
 
I will say that the musicianship of the bands that I have been out to see over the last couple of years is top notch ... almost every drummer has been smokin' good (whatever that means) and able to effortlessly play at tempi that I can't touch.  Most of the bands have been out of Texas and have an "old school country" lineage (my apologies for the cliché and not that I even would even be able to identify old country let alone old school with the exception of maybe the Carter Family). 
 
Last spring we did go out and catch a band that I would categorize not as country/rap but more like country/rap/metal.  Not my cup of tea to the point that when I walked out I was wondering where the freck I lived (certainly not in NJ anymore).  But, I will say the place was packed and the fans (a younger crowd) were rabid.

the other sub genre new to the scene is HICK HOP
 
country rapping

I'm going back inside my bunker. Good luck with your civilization.

Horrible, horrible stuff. The 'Wham' of Country music.
 
Now, country-plus-folk, I like.
 

 
 

Well, I guess you have to first consider this album as being a country music album in order to answer the thread question.