Preference for Reward Distribution (Patreon)

Just curious. Do you guys prefer to have rewards like progress shots, etc. distributed post by post, or at the end of the month?  I don't mind doing them a little scattershot, but I worry about spamming people all the time.

To clarify: I would still regularly post images at their standard resolution (1000px) but I would save larger rewards aside for the end of the month so that I'm not making double posts all the time. It'd help keep people's notifications cleaner.

Thanks for your input!