And, come to think of it, you seem to be the perfect use case for virtual assistants-- I imagine the discrepancy between the return you get from one focused hour of attention versus the cost of one hour of a VA handling some routine task must be off the chart.
Looking at the promos, it looks like he got 15 (mini site) + 15 (email) sales, which appears to be around $700+ in revenue. Percentage-wise it seems notable, but in absolute numbers, I wonder if the time could be spent better in other ways.
There's a kind of minimum barrier of entry to interact on the places we like to hang out (knowledge, interests, etc), so a lot of people tend to get used to everyone being at that level of intelligence/tech savvyness. Then you launch a product that any "tech" person would easily be able to navigate and use, but someone who still mixes up which one is the mouse sometimes might still have some problems with it.
I swear, there is so much we don't know that we don't know about our customers.
Every reason people have for buying bingo cards in September is a reason to buy bingo cards in October, plus the various promotional activities, plus my AdWord spend goes vertical after around October 15th.
Normally, my AdWords performance is constrained by inventory: I could literally buy every click available for sale from Google for the keywords I care about at prices which make sense to me. When I don't bork the heck out of my conversion codes, I'm also inventory-constrained during Halloween, but inventory levels are much higher than usual.
It may be the time to think about other means to reach new sets of prospects.
(I've been interviewed about what I do for reliability before. The short version is checklists and automated warnings when stuff goes wrong. I've set up some automated things to catch issues spiritually similar to the ones described in this post already.)
My guess is that people who need Bingo card software at Halloween will just pay whatever your price is because they are buying the time they are saving.
How much time is $5 really?
Do yourself a favor and build in link tracking/image load tracking to your processes as soon as possible. The historical data is valuable when determining how frequently to email an individual. Generating as few spam reports as possible is important, as these will cost you time and money.