A: Every website supports affiliate URLs. You support it automatically by using UTM tags and Google Analytics. Every website supports that. But it is not great as it falls apart in many scenarios because of cookies, ad blockers and so on.

We do have fantastic discount codes that are trackable and they track the revenue generated. So you just create a code for your affiliates and the code automatically tracks their sales with 100% accuracy. It always works never fails.
You can see the revenue generated in the code.
2. We do not have dashboards for the affiliates to see it on their own. But it is a feature we plan to add.
3. Affiliate URLs are actually the worst way to track affiliate sales. They end up not working a lot of the time and they do not track accurately.
4. Yes the discount can be for something like a free trial or a free product. It does track properly. But the best practice is for the code to provide an actual benefit so people use it every time.
5. We do not support global payouts you will need to handle this part yourself or integrate a system for it.

Usually if you have more than 20 active affiliates you would need a system just for the payouts.
That system would also provide link tracking and can be linked to codes too.