I think everyone's spam experience on the various platforms just tends to vary a lot. Some people see iMessage spam, while others swear they haven't ever gotten one. Ditto for all the other services.
I see SMS/MMS spam in spurts; I'll get one or two spam messages a day for a week or so, and then nothing for months. On Whatsapp, I get a few spam messages a month. I've never seen spam on GChat or FB Messenger. I don't use Viber or Telegram, so can't speak to those.
I see SMS/MMS spam in spurts; I'll get one or two spam messages a day for a week or so, and then nothing for months. On Whatsapp, I get a few spam messages a month. I've never seen spam on GChat or FB Messenger. I don't use Viber or Telegram, so can't speak to those.