Maybe you meant $10/mo/team[1]? There is no monthly charge for pipelines and you can have as many pipelines as you want within a team. 1 pipeline or 5 pipelines, you just pay for dyno time of the apps in your pipelines -- pro rated to the second.
Pricing is similar for Heroku CI -- you pay for dyno time to run your tests.
Note: I work for Heroku and feedback welcome at heroku-ci-feedback@heroku.com (about features or docs).