Well... In short, is there a remaining way to search anything on the site with a third party software and through a VPN ?
why third party software : in order to post-filter results (since the gold accounts don't exist anymore and we're limited to 2 tags search, it's basically the only way to get relevant results...)
why VPN : my country is unfriendly to Hentai searches, since the internet providers are, by law, forced to record all the navigation datas and store it 10 years, and since bestiality/furry/loli/guro/non consensual...etc. is illegal (by law there's no difference between reality and art...)... getting a single result in these categories could give me a ticket to having the police knock at my door at any moment within 10 years... So a VPN is pretty much mandatory.
I mean, most websites block VPN unless we have an account and login, but here, having an account and API keys don't help :/