Did you read the article I linked to? It gives quite detailed information, including:
However, in written English participial clauses can be very useful. As you can see from the examples above, when the subject in the participle clause is the same as the participle in the main clause, they enable us to say the same thing, but with fewer words.
Immediate thoughts were, content does not mention the subject and instead endeavours to establish author’s credibility.
In the good old days the “elevator pitch” to a captive audience was estimated aound five minutes. Current information technolgy has considerably reduced the window and web site’s Bounce Rate is increasing. Time spent scanning a web-page is now milli-seconds!
Having been an accountant for over 25 years, it is my experience that…
If the above sentence was the first for the article then about a dozen words are irrelevant. Also most likely to be automatically included in a crawlers automatic summation of the web-page.
I also think that credibility statements are more suited to the article footer.
Start sentence with Having?
To continue the article heading I would perhaps try something contradictory which is hopefully personal to the reader and is more likely to gain their precious attention:
*Contrary to many reader’s belief, “having” is a not only acceptable but also becoming more popular… *