As a matter of fact they do (read this forum). But as for this question, Segue does not own, nor test EVERY VB control that is out there. If they tried to we'd never get a release out of them. There are THOUSANDS of controls out there. Segue ships support for the controls that ship with VB Professional Version. They then create documentation and facilities like "record class" which help create support for 3rd party custom VB controls as needed like the ones in question.
We have worked with the controls that are in question and have services around these very ones. We would be happy to help you with them.