The graphs that show the luck percentage are not necessary accepted shares. They are solutions that were on a way of being a correct solution.
For example, 50% luck means that you "solved" 50% of the job. If the solution to the job equals to 10 zeroes (0000000000), that means that you got 5 of those right (000005ha72). But the required difficulty might need 7 zeroes (00000007sa). That is how a simple way of explaining how the graph displaying percentages is calculated.
ívijo @Nicehash

I appreciate the opportunity to talk with you directly.
I have rented a lot of hashrate from you. I am globaly satisfied of the hashrate marketplace,
I am a little disappointed about Nicehash actualy. Doesn't your Easymining program only serve to artificially inflate the price of rented Eh/s? The hashrate used by Easymining is always rented well above the average price on your site. This increases the auction price no ?
I mean if you rent hashrate to newbies, I agree that you need to take a fee, but to guarantee your Easyminers to have a constant hashrate, you place orders with super expensive price per Eh/s. Not super honest IMO.
Other thing, I bought some Easymining packs to discover what you are proposing. In my previous position I had to analyse the hashrate rental's market. I bought a lot of Easymining because of this. The screen showing your luck, is TOTAL bullshit. Almost every time the screen will show you "you submitted a share of x T difficulty, that's not possible.
Look :
https://imgur.com/vJkStwUAre you telling me that EVERY time I buy a Gold Easymining 2usd pack I submit a share > 10T ? Do you have some magical power ? Why do you lie to newbies about their luck in mining ? Is your goal to generate addictives behaviors ?
I wish you a good day