Here is the e-mail I received from Kirk Von Kruegor, the PBA Tour Tournament Director:
Dear Mr. Shonkwiler,
Thank you for your recent inquiry. Yes, it is correct that Mongoose and Master are among those companies whose equipment is not cleared for use in PBA competition. However, Robby's (an Ebonite product), Columbia, Storm, Ebonite (main line) and Hi Sports (under the Storm umbrella) all make excellent products and offer wide variety of wrist supports and gloves.
The companies listed above have chosen to support the PBA by participating in the Product Registration Program. We in turn support those companies who have a vested interest in registering their products for use in PBA competition. To allow other, non-product registered equipment in PBA competition would not be in the best interest of those product registered companies who have stepped up to support the PBA.
I hope this satisfactorily answers all of your questions concerning the product registration policy. If you have further questions feel free to contact me directly at kirk.von.krueger@pba.com
Sincerely
Kirk von Krueger
Director, PBA Tour
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Shonk