Works, even if the UI is hopelessly outdated and half-assed.

Not really useful since the dev claims this is cross platform, yet the Chrome side of this doesn't work at all and has effectively been scrubbed from the web.

No free trials so no way to see if the dev is trustworthy without paying him.

nice

I just tried 2Captcha. It didn't worked for me. But I believe that this service isn't that good.
Do you consider to support 9kw.eu at your plugin? My most credits are saved there.