I say this because it seems they are selling domains at far lower prices than they should which leads to destroying values on other domains when this practice is done.
The massive influx of alternative extensions is the more obvious reason for falling domain prices.
Massive increase in supply
Vs little or no increase in demand = falling prices.
Has nothing to do with the number of 'domainers', but the number of domains, as simple as.
Also, with an account created in 2014, aren't you part of the "influx"? If indeed there has even been one, namepros traffic (quantcast) has remained fairly static in the two years in which they have had their traffic directly 'quantified', seems to imply that there is no more activity now than there was two years ago? As namepros is by far the biggest domaining community, if there were a vast increase in the number of people trading domains we'd expect the number of visitors to have vastly increased too?
There have also been some radical changes in domaining which have been created as a result of google algorithm changes. Take penguin for example, which massively devalued exact match domains, there was a time when you could just buy a three or four word exact match domain like buylaptopbagsonline.com, throw up a wordpress microsite, create a few hundred artificial backlinks, and quickly rank easily at #1 for the phrase "buy laptop bags online" within a few weeks.
As a result affiliate marketers would pay very good money for domains like that, thousands in the right niche, I was one of them in fact, I had several hundred exact match domains, almost half of which were developed, almost all of which just siphoned traffic from google and sent it straight to amazon or ebay for a % of the resulting sale.
Several times I dropped several hundred dollars on domains which I wouldn't spend reg fee on now, and I considered them a bargain at the time, because I could spend $300 on a domain, throw up a microsite and make it back in a couple of months....
.... meanwhile, the death of the EMD has coincided with the rise of the brandable, which are now more 'google friendly', and people build brands now because their strategy for organic/free/cheap traffic now requires them to build up large social media followings.
So in that two years I'd argue that demand and prices for strong brandables has significantly increased, I'm sure sites like BrandBucket have grown exponentially in the past few years?
Domains are just a commodity aren't they, demand increases and decreases, arguably the value of the types of .com domains where supply is limited has continued to increase, look at what has happened to the price of LLLL.com domains in just 2015 alone, at the end of last year I was passing on the opportunity to buy mediocre ones for $30 to $40....... and if I'd purchased I could have trebled or even quadrupled my money even just by flipping them on namepros auctions, where prices are famously low.
LLLL.com domains currently look a better bet than bitcoin!