Can I safely use a self-written add-on for the site if I copied it from a company that sells these add-ons?

Question

Copyright

There is a company EXCO, it develops add-ons for sites (tests, voting, animated cards, etc.), which it offers to use by subscription.

Is it possible to use the same self-written addition on your site if the design and visual effects are taken from there.

If not, what could be the consequences?

Answer 1

dumb, but still not a movie to throw on the torrent

Answer 2

Code and graphics are yours: the product is yours.