Deep Fried Siomai or Fried Wonton rose-up from being an underdog to one of the favorite food of the masses. Thanks to the marketing genius of my favorite Siomai house.
Back in the days, Fried Siomai is not as popular as the steamed variety. You cannot buy the fried varieties from most Chinese restaurants and fast food kiosks unless requested. Fried Siomai is common, today.
I think that the marketing strategy helped a lot in making the fried version popular; it has something to do with localization. The product, which is Fried Siomai, is packaged in such a way that the local population will understand and need. This widens the market of the product and increases the chance for it to get sold.