I have been reporting. I have not noticed the slightest change. This means one of a few things:
1. They are unable to detect the bot
2. The response time is in the weeks
3. They have no intention of enforcing it or don't view it as against the ToS
4. The report system is broken and they have not been receiving any reports
5. The punishment is nothing more than a warning
The system in place does not help. You are given no record of your reports and no status on the reports. It could be they review them instantly, but it could also be they ignore them unless it involves RMT.
This isn't about RMT. As you've seen, they do enforce the rules against RMT botting.
As an example, Tailfeather around 8:00 AM Eorzean time. Watch as the bots zone in, perform some conversions and move to the same spot before flying away. Doesn't matter where they zone in, it's always the same spot.