Is there any actually proof that the house edge is 0.5%?
Your losing streak has nothing to do with the house edge, That's all just bad luck. If you had bet high, you would have won those 7 bets in a row and probably not think about it again.
If you randomize so that the server seed is public, my bots will be able to verify the roll numbers for you.
You can use this: https://bitcointalksearch.org/topic/seuntjies-dicebot-multi-site-multi-strategy-betting-bot-for-dice-with-charts-307425
Go to the "check rolls" tab, enter the server seed, client seed, starting nonce and number of rolls, and verify them. It should create a csv file that can be opened in excel or any similar program with the lucky numbers.
Alternatively, you can use the chat bot running on safedice. It's a bit slow in getting the server seed, but once it has it, you can simply use
!s verify
For example: !s verify 1780359
It will execute the same RNG algorithm as the site and return the roll as the site displays it and as it's own calculations determined it.
Another userful formula that wasn't mentioned above is
payout = (100-house edge)/chance to win
Thus 1.99 = (100-0.5)/50
and 1.6583 = (100-05)/60
Exactly! Thank you very much for the explanation seuntjie