[fookyong]

Absolutely spot on analysis :)

For people who are on the trial and need more quota, I simply tell them they are welcome to create 2nd, 3rd etc accounts. I have no issue with that.

"How much free quota" to give is a question with no right answer. So instead of forever trying to tweak that number, I have left it at an amount that seems to be working and I don't increase it for anyone (I have not even built in the ability to extend a free trial).

[marcusstenbeck]

If you ever change it a very restrictive rate-limit could work too. It might be annoying to maintain or combine with the existing credit system tho.

On the other hand, people creating multiple accounts to test things out is a very nice indicator of interest.