When some people post here, the audience is not really sammyboy forummers.
In the 2015 GE, the group of pundits who were going around spreading rumours that the opposition was going to make big gains also posted in sammyboy forum. They used the account "mahjojohn". Through these postings, they steered people into believing that multiple GRCs and SMCs would fall and PAP would crater to 50% vote share.
The audience was not SBF. The audience was the larger population of uncertain or undecided voters who could potentially be swayed by such a rumour. When people get wind of such rumours swirling around, they go online to check it out, and one key stop is SBF, besides obvious social media sites like Facebook.
SBF was used as a platform to scare undecided voters into the PAP camp.
ckmpd's thread was reposted on Facebook recently. So you can't claim the content here is not read by some larger audience. You don't know who it will impact. That's why people continue to post here, because of this potentiality. There's also the lure of newcomers who may not share the entrenched belief system of the oldies here.
