Bottom line is it's a free service, and in order for the hosting company to make it free they subsidise it with adverts.

We have no control over which adverts we see so are just something we have to live with.

(and I still have no idea what a Zwinky! is? )

Probably some perverted innuendo that you've missed

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Zorro - the old codger

The site now also underline's random words in your post. This is just the site owners generating adverts and links etc and not actually put in by the post author to emphasis a point or whatever.