Add .dropboxignore directory to exclude folders without using selective sync

I also need this feature to ignore the file I need update. Maybe it is fine to add a ignore list for me to prevent from updating the garbage to the dropbox.com. It doesn't make sense to me to update all data from the server and half of the data is garbage. The point is there is not a effectient  way to filter the files (like .obj, and some tempoary files from visual studio) which I don't want to upload. I feel it's not friendly to the havey user. I have pay the annual fee for severy years. I think dropbox is very good except lacking this feature. I need this feature so much OR I am looking for another choice for syncing the files.