At Facebook, users from Asia Pacific region monetize at around ~1/15th of US&CA users. The costs to serve those users remains relatively fixed on a per-user basis, so expect those costs to inflate by 10-15x to earn the same revenue. Will Reddit drastically change their business model to appeal to Asia Pacific users and advertisers? It's possible but extremely unlikely and pivoting your business model months from IPO isn't a good plan.

A flood of India users to a western-centric platform is how you kill that platform (see Quora).

Indian users cost the same as US users in operational load but are worth a fraction of the advertising revenue.

As long as they are net positive it’s good for reddit, but the fact that reddit was struggling to make money on the biggest margin users does not bode well.