Per what's detailed in this post, I did a little coding (https://www.pcengine-fx.com/forums/index.php?topic=22594.msg505117#msg505117) to improve the loading of ads given the issues the previous synchronous loading style presented.
Lemme know if you notice improvements with the basic idea, let the whole PCEFX HTML page parse/render, and wait 3.5 seconds later to load the ads in their spots, etc.