Good grammar used to be standard from professional writers. Nowadays, though, you’ll find professional scribes with little or no background or education in English. So, you get the kind of mistakes that are common on Yahoo! DIY:
Here’s an excerpt on the use of use to from the American Heritage Dictionary:
The verb use is used in the past tense with an infinitive to indicate a past condition or habitual practice: We used to live in that house. Because the -d in used has merged with the t of to and is not pronounced in these constructions, people sometimes mistakenly leave it out when writing.