If to you ,everything doesn't seem quite alright then it would be best for you to switch to another site that is similar to them and offering the same services that they were offering. Yup, that's the best thing you can do for yourself if you think the site is dead, unless you want to take the risk and check it out by yourself. If the site is truly dying like you have said ,that means any money you invest in there is likely not coming out. Or you can contact their customer support (if they are still active) to know what's wrong exactly .