60% of the total Signatum is traded on Cryptopia

Yobit trades 35% and yobit has issues with stuck coins https://bitcointalk.org/index.php?topic=2081826.0

Nova trades 4% and nova have their own issues https://bitcointalk.org/index.php?topic=2118683.0

Guess they haven't had a wallet crash yet.

Different exchanges run on quite different platforms and coding.