On an iPad the “opt-out” cancel link is still there if you scroll down looking for it near the bottom of the writing.

Unfortunately, you can successfully Opt Out if Moparts is the only website you visit who deals with Infolinks,
but if you visit another website that is also getting paid by Infolinks,
that second visit over writes the opt-out tracking cookie
and next time you visit Moparts the Infolinks banners will appear again.