Lol you're going to have a bad time looking for logically coherent memes. I think the implied elements here are: Exploitation of C is required for A. Exploitation of C is not possible if C is unified. B enables division of C, therefore A requires B. It may or may not be true but it doesn't hold up to logical analysis (e.g. B is probably not the only way to divide C)
They are great, I've had one installed for 8 years now with no issues so far. I cleaned the sections of both pipes with alcohol before installing, then laid down a bead of silicone and installed the fernco on top of that. Its recommended practice for joining to cast iron since it is so rough on the surface, might not be a bad idea for you.
Assuming you somehow use up your original data cap in... Let's say one incredibly data intensive day somehow. That leaves you with (30 days * 24 hrs/day) * 3600 seconds/hr * 256,000 bps = roughly 660 gigabytes. So I guess that's probably the limit? Plus your original cap.
Try comparing it to other jobs on the site, they all seem to be like that for some reason. Not sure if that's a quirk of their dataset or real