/qresearch/ doesn't have just 300-400 posters. Thats per thread. Actually there are 3000+ poster uids on /qresearch/ with ~1000 posts per hour. The reason for the multiple captcha issue is due to an influx of posters overloading our captcha system. We are working on improving the captcha system to handle the load. /qresearch/ is growing faster than expected and we are working overtime to scale the site for the massive amount of people viewing this board.
If you are reading this and you cant post after updating your Mac OSX or IOS, please disable javascript and you should be able to post. Apple put out an update that broke javascript on a lot of sites and we are trying to find mitigations for it but have not been successful so far.