We (mastervocab.com) have right to delete your flash card, card set or the whole account if you will break the law in your or our country. We may also close the application anytime and we don't take the responsibility for technical failures.
You as a user of mastervocab.com application has the right to download all sets that you created anytime and use them anywhere else unless you want to sell or resell them. The only way how to sell your own sets made with Mastervocab.com is to sell them to us. If we aren't interested in your set, we can allow you to sell it to somebody else.