It doesn't even have to be a website. Phone scammers have been doing stuff like this for ages with pretty low tech. A general rule of dealing with spam like this is "if the source is unknown and it's from a pretty woman or an investment firm, it's a scam". My phone's black list is quite long.
Of course, HTML-based ones can reach a larger number of users with little investment, so it's reasonable to expect this will occur more frequently in the future.
Of course, HTML-based ones can reach a larger number of users with little investment, so it's reasonable to expect this will occur more frequently in the future.