They claimed that they accepted almost half. My guess is that they accepted 100% of the submissions they received. Because if there was any process for rejection, both my papers should have been rejected.

Almost half is effectively the same as 100%. You're buying a credential. It's like paying $350 for a weekend project management certification that has no test, and then complaining that you didn't learn anything.

Yes, technically they're lying. Yes, technically it should be a higher standard.

But if it's an obvious scam, it's silly to get so angry that you can't see or write straight. Sure it's worth sharing to the world that there are scam artists out there, but to get so worked up about it?

Actually, I did not get worked up about the existence of such conferences. My main gripe is against the education system and the ridiculous requirement that makes it mandatory for all post-graduate students to have 2 published papers before they are granted their degree. Given the current state of research and higher education in India, the inevitable result of this requirement would be that students will be forced to pay to publish at such conferences.

Entrepreneurs fill the void to capture rent from stupid regulations. Why not start a conference yourself?