As you see the battle fund is lower at lower ranks and higher at higher ranks . it is due to crystals increased in battle fund per kill ,more higher rank kill more battle fund and so as you know goldbox drops in the ration of 1/7000 and at lower ranks the battle fund is lower due to the above mentioned reality  and thats why lower ranks have llower chance of getting a goldbox

You stole my job anyways there are lot more to help 

This Experience of yours sound like a lag or glitch . Please concern this topic for getting rid of this experience
http://en.tankiforum.com/index.php?showtopic=163692

I hope you understand the nickname cange policy . If you want to get further information SEE THIS LINK
http://en.tankiforum.com/index.php?showtopic=170935

@Žygimantas.Yes , You ARE CORRECT .YOU can share in this link that what are goldbox siteshttp://en.tankiforum.com/index.php?showtopic=234421&page=1and moreoer if you want to show us about golds you caught feel free to share  it at this link http://en.tankiforum.com/index.php?showtopic=204702
             
                                         SIGNING OF ,     CIORNEIRAUTO