American Express has brought back the 25,000 point sign-up bonus on the Ameriprise version of their Platinum card. This version waives both the $450 annual fee and the $175 additional cardholder fees for the first year.
The normal offer on this card does not come with a sign-up bonus, so the 25,000 bonus points after $3k in spend during the first three months represents the increased bonus. Unlike last year during a similar increase, there is no firm end date for this offer.
While this card is meant for Ameriprise clients only, some non-Ameriprise clients have reported having success getting this card in the past. You can find the application link here.
For more info, see this Doctor of Credit post.