Common Crisp. Who in the team had the idea that you need to create and install a custom Crisp plugin just to use REST API to subscribe users to newsletter?!? This is so complicated it hurts. To make things worse, creating a plugin, you are require to create a new Crisp Marketplace account (your Crisp account will not work), then you need to do tons of settings to create and publish a plugin... What the hell happened to Settings -> API keys and you are good to go (like any other online service)...
I mean don't get me wrong... Crisp is great tool, but some decisions the tool takes are just wtf.
Crisp had a massive impact on quality of our customer support at pony ! It's simple and efficient yet powerful and affordable.
Beside, Crisp team has been great to work with !