First Search this forum. There are some topics that are updated daily with scam ICOs. (will try to post links later)
Second. never join campaigns that require you to pay first. These are well known pay to receive scams.
I feel sorry that good people fall for scams but it also serves as lesson to be cautious in future.
yes they are an experience but I have never seen any project that provide you something without paying? like you want to buy their tokens then obviously you have to pay.
please tell me some projects which does not require any payment?