1. They do not follow the rules. It is known that some people will buy a new piece of gadget and fail to read the owner's manual and when later problem comes, they start complaining. It is same with doing bounties. You do have to read the rules and follow them to the later.
2. When the rules are updated, they do not know and thus suffer from it. This one reason why people do not get rewarded. You have to be visiting the bounty thread or page to know if there is an update or checking social channels mostly Telegram.
3. People using your username and copying your content (blog). If you are doing bounties, its good you continuously check the spreadsheet to report any one who you see using your name or copying your work. This is important else some bounty manager may blacklist you thinking you are one doing or just blacklist both you and the one using your details.
4. Finish the bounty program. You may have noticed that the spreadsheet of bounties you have done shows that some people took off their signature prematurely. You just have to finish it else you wont get paid. This is like following the rules.
5. When you are told not to mention bounty in the main telegram group, just stick and obey the rule.
6. If a project advises for KYC and you dont like, just dont do it.
Thank you. hope this helps somebody to know where they have messed up previously.
Over and Out.