[BraverHeart]

They could easily implement a reputation system, with checks and balances, and a strict approval process.

Or implement a progressive system that allows you more freedoms as you build a good reputation (Being an honest business, not having spam intentions)

The painful part of on-boarding for me was technical (Setting up API keys, doing initial configuration, etc., the UX is bad), not administrative.

These are just ideas I thought of on the spot, I'm sure they can come up with a better workflow if they needed.

[BraverHeart]

Also the current limitations don't solve spam, I get spammed on WhatsApp often, it just limits it on the expense of non-offending businesses that want to offer quality service to their customers.