Duh. Did you bother to check what
Eventor is and what it does?
It is a federation-level system for maintaining pretty much all data, entries and results included, but also memberships, calendar, and rankings. Records travel between the membership database and event-management software, then the results go back from the event management system to the database. Everything is consistent between clubs, no need to copy things. It knows who you are, enabling few-click entries and membership renewals, and automatic rankings. Plug your spamulator into the database and voila, leveraged promotion.
Its functionality is far wider than that of Event Register. It can do everything Event Register can, and many times more.
Levy $1 per start for the 50k starts of OUSA and you'll be done paying for the license in a couple years.
If this community weren't full of [deleted], it would be thinking of how to make Eventor happen, not suggesting that someone reinvent a limited-function wheel on the cheap.