TrackerSmacker

TrackerSmacker ("TS") is the name we've given to our DNS-based ad/tracker blocking service, powered by https://github.com/hagezi/dns-blocklists.
The idea is to block hosts that are known to use intrusive tracking methods, which could compromise the anonymity cryptostorm provides.
An example would be visiting a website that's using one of these trackers while on the VPN, then revisiting the same website later while not connected to the VPN (or vice-versa).
The data recorded by the tracking host would allow the website or tracker owner to correlate the data, essentially disclosing your real IP to them even when on the VPN.

Another benefit to blocking ads using this method is that the website won't be able to tell that you're blocking their ads.
With browser addon ad blockers (Adblock Plus, uBlock Origin, etc.), a website can detect that you're using them.
Surely you've seen it on some websites, "Please disable your ad blocker in order to view this content", etc.
Some even go so far as to have that message fill up the whole screen, making that website useless until you disable your ad blocker.
With DNS based blocking, they can't detect it so they can't annoy you about it.

In order to use TS, you'll need to use the DNS server 10.31.33.7 when connected to cryptostorm.
For those using the configs from GitHub or hosted here, that means you'll need to edit this line in your configs:
# Uncomment the line below to enable our DNS-based ad/tracker blocking service.
#dhcp-option DNS 10.31.33.7
Just remove the # at the beginning of that #dhcp-option line to enable it.
A quick method for uncommenting that line in all your configs would be the command:
sed -e's/#dhcp-option/dhcp-option/' -i *.ovpn
(while in the same directory as your .ovpn configs)

Those using the widget can enable/disable TS from the Options window in the latest version: