This reminds me of my ban from Gumtree. I had issues making a post because I was using uMatrix which blocks (the malicious) reCAPTCHA that they use to block spam posts. With no errors about the missing reCAPTCHA script on the screen and just redirecting me to the submission after what seemed like a sever error, I just tried to resubmit my listing 3 times in a row. I got banned. I emailed them along the lines of "hey,…
The same thing happens with corporate VPNs. I guess it only makes sense that Apartment.com doesn't want your business if you're making a bank at one of the larger companies who are big enough to require a VPN service!