We have updated the daily quota limits for the different accounts. If you already (before 3rd of March 2017) are subscribing on an account this will not affect you.
The adjustments are made after looking at the statistics of our users. Before the Indie and Professional account had the same rate limits but at different prices. The new model is a ladder from Indie to Professional accounts, with growing discount the higher you get.
This also affected our translation api, which now gives you 40 characters per call instead of 10.
The new pricing can be found here. We will see how it works out the coming weeks, we might have to make some adjustments.