i looked into lighthouse and i didn't like the fact there is a minimum funding amount in relation to how much u want to raise. if someone wanted to pledge $1 they can't if your funding goal is $2000+... thats one big issue i have with it. the dev said when the block size increases, this problem would be solved.
Yes, lighthouse imposes a minimum pledge size based on your funding goal. This is because if there are too many pledges in total, the final Bitcoin transaction which settled all the accounts would be too large to fit comfortably into a single block.
The crowdfunding solutions such as StartJOIN get around this by having a trusted 3rd party to hold all the money until the deadline is reached.