Sale Ends Tonight at midnight PDT!. Save up to 35% off all packs, upgrades, and skins during our Labor Day sale! Grab or upgrade a Newcomer Pack and get access to our developer builds, exclusive perks, and a copy of the final game!"
There is a $1 dollar sale for the monthly sub usually costing $7.95 even for a month that's a good saving to get an ingame skin shown below.
It doesn't have the latest build access though just the one before that.