Most LLs allow us freesite builders 3 outbound links per page. What I normally do is use one of those links on an interior page to link back to my hub. I have done it as a graphic, but have lately gone to a text link. Example -
Pussy Shavin' has 2 sponsor links plus recips and the COPA stuff on the index page. If you enter the site, I have 2 sponsor links plus my hub link back. As long as you do not exceed the recommended outbound links AND it is not a blind link, you are usually okay.