There are a number of problems that Free TON or Velas has, not transparent fulfillment of partnership,
competitive conditions. Ignoring them creates chaos, which can only be solved by a convenient
service that can take on the task of vesting, canceling transactions (to the buyer) - if the
seller has not fulfilled your conditions, then by entering the secret word you can return the
rest of TON Crystal or Velas to your wallet from which you paid.
Transparency is just one of the many uses of blockchain technology.