Nice to have an easily found pricing page. It looks like the product takes a twitter feed and strips it down to 'popular' posts which are then emailed in digest

Nice to have an easily found pricing page. It looks like the product takes a twitter feed and strips it down to 'popular' posts which are then emailed in digest form. If something is found interesting, how do you interact with it? Do you need to go back to the twitter site? Is this a RSS style stream in email form? How can feed item selections be adjusted? What data is being mined? How will you deal with the temptation to accept money for classifying a post as trending?