It looks like your widget displays roughly the same information each time but costs you a new map load per user, who may or may not be interested in hotels. Th

It looks like your widget displays roughly the same information each time but costs you a new map load per user, who may or may not be interested in hotels. The event planner who is using your widget is not sharing in any of the cost. I think charging them is probably not what you want, so the alternative is to lower your service level to them. By this, I mean simply display a pre-generated image of the map, and make users who click open up a new tab to your site. That way, you only load a map to users who might convert. You could try other map sources, multiple ones to get you as much free tier as possible, but eventually you'd run into the same problems again.