Hi, it probably depends on the plugin and if it’s an important functionality for you, just contact developers, ask questions. This is so helpful for them, as they are really trying to do good product, it’s not like a developer wants to hide some bugs.
Something that I experienced with my code plugin is that plugin worked differently when was added by Marketplace. I had to debug a lot what is going on and I couldn’t test it anyhow before actually releasing the plugin.