Original sentence: Less controversial uses of interstitial pages include introducing another page or site before directing the user to proceed; or alerting the user that the next page requires a login, or has some other requirement which the user should know about before proceeding.Some people take issue with this form of online advertising
Edited sentence: AdBlock, a controversial tool to prevent the display of online advertisements.Adobe Flash, a technology similarly controversial in its application for online advertising.Some people take issue with the use of such pages to present online advertising before allowing users to see the content they were trying to access..  Less controversial uses of interstitial pages include introducing another page or site before directing the user to proceed; or alerting the user that the next page requires a login, or has some other requirement which the user should know about before proceeding