When Suddenlink Communications offers its customers a discount when they order their television, Internet, and phone service all with Suddenlink on just one bill, it is an example of

Price bundling

Explanation:

Price bundling -

It is the practice of selling a combined package of goods and services at a much lower price, than selling it individually, is known as price bunding.

The practice is beneficial as it increases the sale of goods and services.

For example,

package of TV channels, new mobile phone with some data plans, getting something free on the purchase of a particular commodity, is an example of bundle pricing.

Hence, the example shown in the question, is about price bundling.