I can't find Stake's spreadsheets with the names of their participants, but I am pretty sure Charles-Tim is part of their campaign.
If Stake and someone make the deal without the person applied on the campaign thread, the person may not be in the spreadsheet. If not because I know some people in Stake, I may not even know that there is any spreadsheet because I am not there. I guess people like AB de Royse777 and yahoo62278 may not also be on the spreadsheet.
Certain members are not on the spreadsheets because they have gotten offered a custom deal. None are likely going to discuss the deal with anyone as honestly it's noone's business.
People may also be wearing a sig just to support a site and are not employed by the site. It's not illegal and i'm sure no site is going to complain about free advertisement.