TLDR: NEVER SEND CASH IN ADVANCE.
There's no reason why a Pro cannot look for a Sugar Daddy. Over my 12 years of sugaring, I have met many SB's that either were current or former escorts. However, it's useful to understand WHY she is using Seeking. There are generally two primary motivations, and neither are disqualifying.
1. She's looking to increase her escort client base and thinks Seeking (or other Sugar sites) will enable that. This is generally frowned on by Seeking Admin, and if the realize why she is there, she will no doubt be banned. But it may not be a problem with other site admins... The question for you is whether she will offer Sugar-like interactions: multi-hour dates with no fixed time period, at a reasonable rate (i.e.: generally equal to or less than her one-hour escort rate), and will treat you like a boyfriend while you treat her like a girlfriend while you are together, as opposed to a hooker/John paradigm. In other words: kissing, holding hands, flirting, cuddling, no restrictive rules (but always with full consent) and more. If you are both comfortable with acting like you are dating, then have fun. If she wants to "book by the hour," expects an upcharge for extras (like CIM), and other hooker behavior, it's likely that you won't enjoy it and/or she will ghost you soon (for a bigger wallet).
2. She is genuinely looking for something deeper than what she gets from clients. And a Sugar Daddy appears to fit her needs. In this case, her job is (almost) irrelevant, just as if she was working at a Dentist's office, retail job, or a restaurant hostess. This use case is probably rarer than the 1st one, but I've seen it in the past (and present).
Factors to consider:
1. Like any other SB, these women can be just looking for BnB (Bang and Bail) dates. Perhaps this stems from an overriding need for cash, or a psychological impairment with intimacy in relationships, or she likes you enough to fuck for cash but not enough to hang out with her clothes on. You decide what you need from any sugar relationship and follow your gut.
2. As with ANY and ALL SB's, never send cash in advance. This must be repeated: NEVER SEND CASH IN ADVANCE!!!!!!!
I have the same rule when booking hookers, though there is ample debate on TER in the General Discussion Board about deposits.
3. Contrary to muggle (civilian) opinion, Pro's tend to get tested frequently and, given the relative anonymity of their clients, they tend to always require condoms for intercourse. If going BB with a SB is important to you, as it is with me, you will need to have significant discussions with SB's who are also Pros. Not saying you can't get what you want. But you will need to discuss all aspects of testing, how each of you interact with other partners, and will need to develop enough mutual trust to feel comfortable. This really is no different than with any SB. But if she is a Pro, you know she is seeing a significantly higher number of partners than a non-pro (...maybe

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Life is good
The Cat