You may have found yourself one of a few sites offering prizes or surveys when you click on the board. I have had this a couple of times and thought I had a virus or malware. Scanning the PC showed nothing, but reading the Proboards Support I see that others have had the same.
Apparently there was a rogue advert redirecting browsers to these sites. Support says this has now been identified and removed.
Inventor of the Triangles version of Bar Billiards. Highest England away aggregate 2013 and 2014, 10 - 0 last 10 England singles legs, seventh reserve 2015. Jersey Qtr final 2014, 2015, 2016 - Guernsey Plate Winner 2014, Main Final 2015, 2017. First person to have won both four pin opens.