That's personal information to Stormeus so you'll need to ask him if you want the answer.
If I had to guess it's a fit amount for the service we're getting 
The current host technically costs USD $5/month but because DigitalOcean hands out a shitton of promotional credit it's free for 22 months.
OVH, which hosts the Canadian box, charges USD $2.99/month for a (relatively) low-level VPS in Canada and should charge a comparable amount for its European division.