Invisible links may affect your Search Engine rankings and it is better to use some other component for this.
Also, meta ad insertion is disappointing and it's like having a MS Word file that has "Created With MS Word" after every page!
Very poor and sneaky tactic by developer!
The provided informaiton is simply NOT TRUE.
1. there are no HIDDEN links
2. there are links only in FREE edition
3. all this information is clearly stated both in ARTIO webpages + the Joomla Extensions Directory