We've been using Transifex for more than a year now, and quite happy with the way crowdsourcing can help enrich the reach of your extensions. However, updating all the resources for all the extensions was a painful task and something everyone wanted to avoid. The tx-client eases some pain by allowing easy pushes & pulls of source files & translations. However, the tx-client relies on a 'config' file to be updated with all the resource slugs. With so many extensions and also with so many plugin language files getting added regularly, it's a tough task to keep on updating the config file.