Patreon Exclusive drawing question. (Patreon)

I was going to do Tilly for this months exclusive drawing, but i was wondering how many patrons would be interested in me starting a raffle? This would be a good way to ensure that patrons that don't get a reward sketch would have a chance at seeing something they want drawn. The only issue is I haven't heard responses from everyone I've sent messages too in the past and I'm worried about it being fair. I also think the patrons that receive rewards outnumber those that don't so this might be unfair in that respect too. Let me know what you think. You will only be eligible if you paid your pledge this month and wont kick in for those who just pledged till next month.