Yes, but the difficulty level can be controlled by the hoster, even if it is a Google captcha. Otherwise it wouldn't be the case that some RCv1 sites have the extremely hard (unreadable) ones after the first attempt (filejoker, for example), while others almost never do (upload.to) but only when being hit by JDownloader (minus the browser loop). I did find it makes a big difference on what browser you use for the loop, though. For me Chrome, while being less intrusive when running the loop, has huge issues with the loop "timing out" and just serving up junk captchas, whereas Firefox, with it's focus-stealing popping up as the active window, is pretty reliable as to giving solveable captchas.
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