Some others shared that this is likely a federated mastadon post and that the formatting doesn’t get translated well. To me, this looks like a couple of short comments with links to 3 communities, but no specific content related to the comments. Here’s a screenshot:

No offense intended.

Is this spam?

The filament path does degrade. You want your filament to travel through your PTFE tube and nozzle with the smallest air gap possible (from extruder to nozzle- filament roll to extruder doesnt matter as much).

Due to wear over time, your PTFE tube and nozzle are both “wear items” like the brakes on your car.

Here’s a great article with photos of some new and used nozzles that have been cut in half to show the wear.