Some of this is, I honestly think, FX just sells more guns. Look at the number of different companies in the United States whose primary brand is FX. Now compare that to Daystate, Edgun, AGT, RAW etc. Sure, they exist, but there are just so many. It seems like business for FX is absolutely booming, and so it makes sense to me that posts would be roughly proportionate to sales.
There are three other elements at play here though, I believe.
First is that FX keeps changing things. Some of this is spectacular advancement, which keeps people excited and talking. This relentless pace must be hell from a manufacturing and supply perspective, I certainly wouldn't want to be trying to handle that as a company, but they keep doing it and so it generates buzz. This keeps things moving and shaking though. What would you post about an Air Arms TX200? The design has remained essentially unchanged for years. They are great guns, and sell well, but what is new that would generate buzz? Nothing really.
The second is that FX guns are made to be tunable. And that invites page after page of questions, difficulties, troubleshooting, etc. I've not seen any evidence FX has a higher defect rate than any other brand, in fact I've not seen any good data on defect rates per brand at all, but boy they get their share of roasting for both the fiddle-ability (user error) and large sales numbers they generate (some percentage of everything has a defect rate). Take the Air Arms TX200 again as another example, once again a great gun which sells well, but they are relatively rarely tuned and if/when they are, it usually is either with a kit or by sending it to someone else. It isn't such a complex mystery that even "average" users are diving into, if that makes sense.
The third is slugs. This slug game is changing expectations for performance of airguns. I'm personally not a huge fan, but a lot of people are and with good reason. However there is still a fair bit of mystery and necessary work to get slugs running well in a given gun, and FX has pioneered that. If you were to take another brand, say a Daystate Redwolf, sure you can put slugs in it and tweak the numbers up and down, but beyond that it either groups or it doesn't. FX has added the changing of barrels and calibers to the list of tunable options, and so now there are major games afoot. It has made the slug game a lot less "take it or leave it" but rather a tunable exercise.
And there is a final element I'd like to point out here, which is that guns such as the Umarex Gauntlet may also sell extremely well. They are more entry level and less of an enthusiast's rifle though. If you spend a few hundred dollars on an airgun, maybe you want to go online and talk about it, but maybe you also just wanted a squirrel gun and are happy to leave it at that. More expensive airguns though become more of a "thing," as you're more invested both financially as well as emotionally/intellectually, so you may be more inclined to spend time that you can't be shooting on your keyboard talking with other people wishing you were shooting and learning about airguns.
Just my 2c.
