The preferred method for contacting Archaic is via the Contact Us form on the Bulbagarden Forums (no registration required to use this form)
Bulbagarden is not and will never be interested in unsolicited offers from advertising networks, so please just stop sending those. We are happy with our current arrangements, and any unsolicited emails will simply be treated as spam. If we did for some reason decide to change our arrangements, that will be a decision we make on our own after we have done our own research.
Archaic can also be found on LinkedIn, but please be aware that unsolicited connection requests are likely to be ignored with extreme prejudice.