Some datacenter IPs can post fine, mostly just not those belonging to any large hosting company. I would mention a list of ones I know aren't blocked, but, well, that might get them blocked.
That’s surprising to me. I assumed they were using some service (like Cloudflare) with an updated list of non-residential IP addresses.
I’ve only ever tried to post through Cloudflare WARP (or Apple Private Relay, which is also Cloudflare but different exit IP range). Once I realized that didn’t work, I thought maybe it wasn’t worth posting at all :) I don’t like the idea of my ISP having any suspicion I posted to 4Chan (even if it’s technically https yadda yadda…)
I’ve only ever tried to post through Cloudflare WARP (or Apple Private Relay, which is also Cloudflare but different exit IP range). Once I realized that didn’t work, I thought maybe it wasn’t worth posting at all :) I don’t like the idea of my ISP having any suspicion I posted to 4Chan (even if it’s technically https yadda yadda…)