The last 2 surveys I completed from samplicio.us on a survey site have gone all the way to total completion and then an "error" occurred with the url at the very end. It is always "www.samplicio.us took too long to respond.
HTTP error 504". This seems a blatant ripoff of information and money compensation from the respondents taking the surveys.
I have reported this to the survey sites I am registered with and hope that something gets resolved with this company. If they are turning into scam artists they need to be removed from the various survey sites that use them.