You have received a @GrumpyCat flag because you or someone else sent money to buy votes from an irresponsible non-GrumpyCompliant service.
@sneaky-ninja is acting irresponsibly by selling votes on posts very close to final payout. (Higher abuse rate)
Sending money to these bots is also financially supporting for-profit spammers.
To know what voting bot to use, refer to https://steembottracker.com/ and use those that have 3.5 day or less in the "Max Age" column.
Important, The above bots have made no effort to comply for months so the votes they sell might still be targeted even if they change their Max Age to 3.5 day.