The only problem I see with that is there are some exclusive titles for events/higherups and unless those titles are banned or restricted from being made it wouldn’t make them exclusive anymore . Also 20K is way too low since it’s about 20 days worth of daily rewards.
20k is definitely too low. If this were to ever happen I’d say it should be about 100k - 200k. It may seem like a lot but I mean it wouldn't mean everybody can have their own title ASAP as you would have to sorta earn it.
I think the very existence of custom titles devalues pretty much all 'rare' titles in general. We've talked about this before and it resulted in us instead letting Supporters set their own custom rank colour. It's unlikely we will ever do this but like Karmic said on the off chance it ever happened it would be a substantial Donator perk, not a pointshop purchase.