Hi Gustavo, apologies..
First question: It is not a bad idea and we have thought about it, but not only is it a completely different monetization method completely changing our existing model and requiring a lot more dev, we are seeing the majority of people don’t want to pay to see lost content.
We are absolutely planning to add a ‘pay to view’ feature for our Crestor accts, but this isn’t until later this year.
Second Question: No, we do not limit or throttle bandwidth in any way. If anything your VPN is doing it, may be the size of image/video you are trying to watch. Some people upload very large videos that take time to display, but we don’t throttle from our side at all.