Not sure why the sites did not populate... trying below:
http://wordpress.org/plugins/seoslides/ <- plugin
https://seoslides.com <- homepage
https://seoslides.com/upgrade <- upgrade page
http://seoslid.es <- aggregation site
http://sparkcatalyst.com/slides/youftw/ <- sample imported presentation
https://medium.com/what-i-learned-building/526056443ce0 <- medium article