Which is happening, especially with branded accounts which are representing a company, basically employees are using it, rather than a central figure. However, I guess that could be argued to be different, since its representing the brand, and not the person behind the account.
I may have this wrong but I see absolutely no problem with a branded account being used by multiple people. If for example the Cloudbet account was initially being used by their representative before another called "Ronnie" took over duties and later another employee is using it, that is not forwned upon and rightfully so. Really though, I don't think too many users here are sharing their account with someone else, seems like you wouldn't gain much, other than potential privacy by reducing stylometry. Other than that, I would think the cons outweigh the pros.
There might be some cases where multiple users are using the same (non-branded) account and it make sense for them to do so according to their own specific set of circumstances. I think most members here would automatically connect multiple users operating a single non-branded account with nefarious purposes but it is not always the case. 
