Can backlinks to my site increase my chances of plugin rejection

If you are not creating plugin which will put link back to your site automatically without user consent I do not see a reason why that will be problem. WordPress community can reject your plugin if it is spam or have issues with security..

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)