I don’t know, but I definitely wouldn’t be willing to pay $89 to renew a domain. I’d say $25 is typically the max I’d be willing to pay on an annual basis. I think those $100 domain renewals are unreasonable.
Depends on the domain. If it's a domain I have had for years and it has traffic, then sure I'll pay to renew it even if it costs $100 bucks.
Now for most domains, I'd not want to pay anything over $15.