Hey,
This has been addressed earlier many times.
When it comes to closing the spreadsheets for public viewing - the sheets were out and public till the end of the sale and now the aim here is to avoid people claiming tokens on other participants' behalf and using other clever ways of scamming honest bounty programme participants. We have already removed a lot bot accounts/links and have identified a number of bounty claim scam attempts.
The other massive issue with open spreadsheets is that these open bounty lists are large data sets which are stolen and misused by an ever-growing industry of scammers/phishers/spam advertisers. Upon discussing with other companies whove carried out token sales and have taken hard lessons, weve decided to learn from them and not publicize the sheets.
Actually you can validate those claims if someone is fraud or claiming for someone else. You can check the profile of Signature campaigners and in its profile, mostly they put their Ethereum address on their "other contact info" or in "location". This way you can validate and recheck if someone is lying.
The problem is, Jack order to filled up another form with a deadline, this is vulnerable to fraud because someone can filled up again copying those spreadsheet names and inputting their "own ETH Wallet". If the original campaigner is not aware, its the job of the campaign manager to check by comparing the Eth wallet address from their backup copy or master list of participants.
Solution to this, is to audit all participants in Signature campaign, we are only less than 300 participants. By doing so, all must ordered to put their wallet address on their profile.
But since they give already all bounties to those who filled up in "another form", without checking it if someone is not on the list, thats why we have a problem like this. We can't have problem like this if proper audit is made by the manager.