Developing a modification: when should I create a plug-in and when a product?

[Triky]

It could be a stupid question, there is no way. But you know, I'm a noob here.
I would like when, developing a modification, should I create a plug-in or when should I create a product. Can you please help me? :)

[Opserty]

If you plan to release it - then always create a product.
If its for just your own forum - Just a single plugin = leave it as a plugin. For more the one, create a Product.

[Triky]

Thanks.

[MoT3rror]

Just as a warning if you put any plugins/settings/phrases/templates under vBulletin and not your product, they will be deleted when you upgrade your forum.

[Triky]

Then, if I create via the AdminCP a plug-in, when I upgrade will it be automatically removed unless I have it stored/imported on/using a product?

[Opserty]

Just as a warning if you put any plugins/settings/phrases/templates under vBulletin and not your product, they will be deleted when you upgrade your forum.
I'm pretty sure vBulletin doesn't touch anything that doesn't belong to it, during an upgrade...

I have upgraded many times with Plugins listed under the vBulletin product, they've all remained there.