Hilton HHonors American Express card. 80,000 points for spending $2,000 in 3 months; no annual fee. Ends May 31, 2017

Hilton HHonors American Express Ascend card. 100,000 points for spending $3,000 ; $95 annual fee.

Hilton HHonors American Express card application page. 75,000 points for spending $1,000 in 3 months; no annual fee.
Public offer expired Feb 1, 2017 (this link brings up a page: "This campaign has expired. Thank you for your interest."), but Refer a Friend links still active. This one has the referral ID stripped out.

Citi HH Visa 40K application page (spend $1K/4 mos.)

• This offer does not contain an explicit 24-month restriction.
  If you apply using this link & are not instantly approved, DO NOT CALL CITI.
  Calling in risks alerting Citi to the offer and having it withdrawn.

Amex HH Surpass Card
Citi Hilton HHonors Reserve Card Citi HH Visa 60K application page. You can also apply by calling 1-866-615-2274.
Basic Amex HH Card

1. Are these cards churnable?
As of May 1, 2014, Amex will not give a signup bonus to card applicants who have held the card in the past ~7 years, even if the applicant has never earned a previous signup bonus for it. However, it is still possible to upgrade an existing Hilton Amex to the Surpass card to earn a bonus (and reportedly to do this more than once by later downgrading & then upgrading again). The best strategy is to earn a Surpass signup bonus first, and only afterward pursue the upgrade bonus(es).

In August 2016, Citi began inserting language into applications and landing pages requiring a 24-month wait from the date of the opening or closure of any Citi Hilton card. Previously, the Citi Hilton Signature Visa and Reserve cards were on separate clocks for each applicant. Now there is a single 24-month clock reset by open/close of either type of card. For more info, see the wiki at Citi Hilton HHonors VISA [60k-75k, read Wiki to choose].

2. I have met the spending. When will my bonus post?
For Amex cards, the bonus will post a few days after meeting the spend. The points from the actual spend will post after statement is generated. For Citi products, bonus points post only at statement close.

3. What happened to the Amex drugstore category spending bonus?
Changes to Hilton Amex cards as of May 2013 are explained here:
http://boardingarea.com/blogs/viewfr...at-we-thought/

4. What is the link to upgrade from no fee card to Surpass card for 50,000 after spending $3,000 in the first 3 months?
This link redirects to this landing page. Application page.
You need to be logged into your Amex account first, then click on the link above, then click Upgrade. (This does not work for all people. It is suspected that only people that have had the no-fee card for at least one year are able to upgrade to the Surpass card.) There is generally no hard pull on your credit report for upgrading.

5. Does having one of these Hilton cards preclude me from successfully earning the signup bonus on a different one?
No. All four cards are separate products. Having (or having previously had) one of them has no effect on your bonus eligibility for the others--but note, as discussed in FAQ #1, that opening or closing any Citi Hilton card will affect your eligibility for any new Citi Hilton card bonus.