There are campaigns that their tokens are even escrow by an agent like Dabs.
That's why to secure a campaign you should look for those campaigns that has escrow.
If not make sure that the campaign manager is a very well reputable and trusted one.
Me myself didn't have a problem with taking part in a campaign without escrow, the team and the idea was good and I tried, even though they have sold just 30% of their tokens they have paid everything in a week after ICO. Unfortunately they had not enough marketing and their tokens are almost worthless, but I cannot say anything about transparency of their work. Moreover I still using their app
And if you don't have any problem with the campaigns that you are taking then that's a good one for you.
What is this app / token that you are using it seems that you are enjoying it?