Real world calculation:
1. Investor hands over $100,000 to Vaultoro.
2. As per terms of service, Vaultoro puts 90% into cold storage; $90,000 = 281 dash
3. As quoted by Vaultoro, this purchase of gold will cost the user $385:
0.5% trading fees for the first 500g ~ $105
0.4% trading fees for the next kg ~ $167
0.3% for the remaining 900g ~ $113
4. Storage fees for one year is going to cost 0.4%; $400 = 1.25 dash
$100,000 x 0.004
5. For the user, total expenses for the first year is $785
$385 trading fee + $400 storage = 2.45 dash
6. For the user, total expenses for 5 years (excluding final exchange charges) is $2385
$785 + (4 x $400)
Meanwhile, Vaultoro uses his cold storage dash to earn rewards:
7. A masternode currently has an estimated payment of $61.69 per day.
8. A masternode currently has an estimated annual payment of $22,516.85
$61.69 x 365 = $22,516.85 (70.42 dash)
9. The investor has given 281 dash to Vaultoro (see point 2). Therefore, Vaultoro's cold storage (masternodes or masternode shares) is earning them $6327.23 every year.
$22,516.85 * 0.281
10. Based on this single user investment, Vaultoro's profit for the first year will be $7112.23
$6327.23 + $785 (see points 5 and 9)
11. Based on this single user investment, Vaultoro's profit for 5 years will be $32,421.15
$6327.23 * 5 + $785
12. Vaultoro masternode income from user investment overshadows the user's trading fees and storage fees:
$6327.23 (see point 9) compared to $785 (see point 5)
One can argue, regardless of which side of the trade the user is on, they are swapping the volatility of dash with the stability of gold. It's their choice and I do not argue with this.
However, based on the numbers above, it seems to me, this is a very profitable venture for Vautoro with little downside. Surely such profitable venture should be funded from their own pocket. They cannot, after all, make such profits by exchanging bitcoin for gold.