According to @OnchainLens, Nansen is offering $69/month or $49/month on a 1-year plan, plus an extra 10% discount on all plans, source: @OnchainLens. After applying the 10% discount, the implied effective prices are $62.10 per month on the monthly plan and $44.10 per month on the annual plan, source: @OnchainLens. On an annualized basis, that equates to $745.20 for the discounted monthly option versus $529.20 for the discounted annual plan, a $216 difference (about 29% lower), source: @OnchainLens.