So you want these messages? You're happy to see them?
Even if there are a few people who want these messages, I'm going to wager that you'll only be profitable if you're messaging a lot of people who don't (and accidentally agreed to get them).
> "many" consumers? "most" consumers? maybe. but I'd be slow to underestimate the size of the market here.
Your market is restaurants, and the market is certainly huge.
> As for boostly, I think it will only shoot ourselves in the foot to overstep (or even get close to) these important boundaries.
Depending on how much VC money you've taken or will take in the future, you won't have this choice. Your investors will demand growth, and the only way to get it will be to creep further and further out of your comfort zone. Marketing automation is full of dark patterns. The only company I know of that never really implemented them was MailChimp, and MailChimp also uniquely never raised capital.