Hey Guys finally I have found the only best option to get free seedbox , ofcourse the right world would be trial boxes but as you know when a thing is free you are the product, but said that to me these plans look awesome , Pulsedmedia one of the top players in seedbox is providing these seedboxes. mOstly in two slots depending on the availability you can opt for them , though most of the times that I have checked the plans do look legit and the two plans have the links below.
One day Trial 30 GB
7 day trail 10 Gb
You Can check the availability status here : Link
Please let me know your experience so that it can help the other users as well.