Am i allowed to put it in my Sig? i am a law abiding flyer talker so would love to know

From the TOS:

Signatures
A personalized signature is available to you once you have achieved 180 posts and 180 days as a member. Because these signatures appear at the bottom of every post you make, the following rules apply in order to minimize distraction within the forums:

Signatures are subject to the rules governing all FlyerTalk content (e.g. those which forbid the furthering of illegal or fraudulent activities, the use of profanity, vulgarity, hatred, abusiveness and harassment).

Affiliate or referral links resulting in any form of compensation, including points or miles, are not permitted in signatures.

All links and referrals to credit card sign-up pages, marketplaces with a primary purpose to promote the sale or referral of credit cards, or any other offer related to credit cards, are prohibited in signatures. For clarification, if you author a blog focused in the areas of travel, miles and points, your signature may link to your blog — provided that the link is not directly to a post or webpage about credit cards.

Except for credit card sign-up offers, signatures that specifically relate to your travel-related commercial ventures are allowed. Other commercial signatures are not allowed.

Signatures of a religious or political nature (other than campaigning for FlyerTalk's elected TalkBoard) are not allowed.

Signatures containing direct links away from FlyerTalk to charitable activities are not allowed, but you may use a link to your thread in the FlyerTalk Cares forum. (See Rule 11 — Charitable Posts.)

You may not manually insert a signature into the body of a message or user profile unless you are an official company representative, as designated by a green-colored username.

Graphically, your signature must conform to the following standards:

Use no larger than the FlyerTalk default posting font size.
Limit it to two lines.
Limit the use of emoticons or other highlighting characters/symbols/other keystrokes to 2 (total) per signature.
Do not use spaces, characters, symbols or other keystrokes that stretch your signature beyond standard column widths.
Do not use all-caps, alternating caps, alternating use of color, or other unconventional methods of attracting attention to your signature. Two emoticons, characters, symbols or other key strokes in addition to text are permitted.
Do not place your username in your signature as it already appears in all of your posts.
Do not embed images of any kind in your signature.

Should you wish to not see signatures at all, you may shut them off. You can do so in the Edit Options section of your personal profile. If you have any questions as to whether your intended signature is acceptable, or to report a signature you believe violates the rules, contact the Signature Review Team.

I'll be happy to respond as a member of the team responsible for helping members comply with the rules surrounding signatures and profiles. If the GoFundMe page is a bona fide charity and qualifies for posting in FlyerTalk Cares under the rules of that forum, you're welcome to create a thread there and link to that thread in your signature. Beyond that, a link to GoFundMe would not be permitted in your profile or signature. I hope this provides clear and actionable guidance.

You can review all of the rules surrounding signatures here. It's probably best to check the actual rules page when you've questions as they do change from time to time.

Please feel free to reach out via PM to my colleagues and me if you have further questions, we are mia, missydarlin and Microwave.