[selectiveshift]

You really should have noted you were using on-demand pricing at the beginning of the article.

[late2part]

No one doing over $100k per month is matching utilization perfectly with RIs. Either you are not utilizing some percent of RIs in which case you are overpaying through breakage, or else you are paying on-demand rates for the instances which are not under RI.

The calculus involved with matching RIs to forecSted demand in a dynamic growing workload is NP complete. And any inefficiency delta pays AWS. There's a small part of the curve where your savings is minimal if you don't match perfectly, it it easily goes to negative on the RI change.

[encoderer]

Otoh, nobody spending $100k a month is paying full sticker price.

[late2part]

If you define sticker as published rates - I know of many companies that are paying list sticker price (published on web sites).

You have to get pretty big to get discounts from published prices, far bigger than $1M/year, more like $1M/month.

[encoderer]

That is not my experience with AWS. You will get face time with a rep and discounts to published rates if you're spending $100k a month.

[late2part]

Is that only if you make large dollar commits with additional terms and requirements?

[user5994461]

I seem to recall that there is something like a 5% discount after a few hundreds k per months.

To get a rep (that's unrelated), you have to pay full support which is about 10% per month (with a high minimum fee).