Last year in early december I bought eBitcoin token which turned out to be a scam. Luckily for me I sold them before the ePRX snapshot but alot others have made losses. I really believed this token would be a succes but I've realized that alot of these ERC20 tokens have the same things in common. The devs (or better said scammers) create alot of hype and pretend their token to be the real deal while they never intended to create a working product. I've thought about investing in tokens like Credits and Elixir but I'm afraid they are all the same kind of scam.
Do you trust them?
Of course i trust ERC20 tokens but not blindly trust all ERC20 tokens. Fyi, you can make your own ERC20 tokens and it's easy to make a new ERC20 token. Not all ERC20 tokens are scam, there are also many good ERC20 tokens. It's also depends on the project, if the project is good and promising the token is also become more worthy.
I agree with your opinion, the fraud does not depend on the platform that the ICO uses, it depends on the project. I understand that many fraudulent projects using ERC20 to create tokens create the suspicion that all ERC20 tokens are inverted.