Please understand that these events are designed as a way to increase (the limited) income for shops by getting bodies into the store, that's why the committees that set the events and rules make the "no mailing" rules. Doing so sort of defeats the purpose. They often also set a "no special sales" limit on the member shops for the duration so that all shops have an equal playing field.
You'll notice that most/many of these events take place in the summer travel season in the hopes of attracting tourists to the shops. Please don't bash them for the way they set up their sales events as it's hard enough to run a brick and mortar shop as it is! Try to find a friend/local resident who may help you out by going in for you, or just wait until the end.
Jan in VA (who is excited to see this progression from the shop hop theme Silver Threads and Quilt Country initiated in Dallas TX 18-19 years ago!)