That's the thing. Feeding dropped off drastically (birds and squirrels) for the summer. We were unprepared because we feed all year round (as you should) but not everyone does. We'll be better prepared next year. We have a lot of "firsts" to learn from during this first year.
My wife feeds all year. I notice that feeding materials last a long time in the summer, maybe twenty times longer.
When people run to get indoors instead of run outside to play there will be a cry of "Oh, those poor birdies!".
Pray for bad weather!! Freezing rain! Ice storm! Then a nice below zero sunny day with mild winds!
You will sell out.