Thanks! Good to know. I'm working on a product similar to Heap's webhook for our customers (hence why I'm not very familiar with Marketo). It's good information to hear that this approach is not recommended for our customers. We probably just will not support Marketo activities in the near future. From this integration (and another one I've worked on), Marketo really needs to improve their infrastructure. I'm not sure who to tell this to.
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