Most of the bounty managers have their website in which they upload the bounties in which they manage and make it easy for the hunters to find the bounties they manage and easy accessible for hunters. But these managers don't do upload spreadsheet for hunters to see their stakes.
The bounty managers on Bitcointalk always have their spreadsheet shown to hunters and make them awear of the qualified people and the rejected hunters , but to find the bounty of some favourite bounty managers is not that easy.
Things are not totally transparent when it comes to the Bounties website. I most often do not see excel workbooks on those bounty sites and we can only see how much stakes we have claimed. I mostly prefer the bounties here on Bitcoin-talk.
Of course, here in the community, you can see everything in the google spreadsheets being shared to everyone and how many stakes you earn per week. But most of the time spreadsheets can't be updated weekly as bounty managers are busy manager to other tasks as well. But at least you can call them out if stakes are not updated in time or if there are some mis calculations or even report cheaters found in the spreadsheet.