I am not so sure about bitcoin crowdfunding.
Due to bitcoins anonymity, giving my coins away makes me always feel uncomfortable.
With crowdfunding, you usually have to support startup companies who have no reputation.
In most cases all you can do is gather information from the internet and their website.
There are just too many possibilities of fraud.
Bitcoin crowdfundings is saturated by scammers so theres no way for me to believe on those false promises since i know that they will turned scam. I already see so many scams from it and that s totally enough for me to judge it in that ways so if theres people inviting me on that well id rather block them since i don't trust people who hungry for little refferal earnings since they only care for their self.