Hello @gtg
I have a question about whether there is a mechanism which deletes posts from the steem blockchain after a number of years. I am in discussions with a company to post information about furniture they manufacture to establish a provenance for their products. The idea would be that in 100 years a person would be able to search for a piece of furniture based on a label and be able to see when it was manufactured etc. In 100 years, if steem continues to exist do you think that those records will continue to be there?

PS - unrelated to the above. I represent the driving force behind steemhost.com. It is a site which allows (free of charge) steemians to brand their own site to showcase their own content or content of others they want to showcase.

For instance one of the witnesses: Quoc-Huy Nguyen Dinh -https://www.steemhost.com/@quochuy

It is possible to frame the content from an individual's posts so they appear on an external site by turning off the menus and the banner if wanted.

https://www.steemhost.com/steem/Host.aspx?Host=@yourid&banner=off&menu=off

For example @quochuy with the banner=off and menu=off

You will notice that there is an banner ad on the page. When you hover over it with your mouse you will see how much a visitor (who are logged in) will earn in steem power delegation. The FAQ can be seen here if you are interested in more information.