Detecting and reporting malfunctioning, incorrect or defunct instances about farside

[benbusby]

Hi, thanks for submitting this report. I've noticed this as well, and have been considering some possible solutions.

One approach would be to have an optional, additional validation step for certain services such as Nitter. An extra step to make sure that at least one tweet appears on the web page would likely be sufficient. I believe this would solve all three of the mentioned issues, but I think it would also be a good idea to restrict marking instances as valid if they return anything < 300 for a status code (currently it marks anything returning a status code < 400 as valid, which is why some sites that redirect are still appearing).

Like I said, I've noticed (and been bothered by) this as well, so I'll try to push a fix soon.