(For those / To those) who have been asking me about the tips, I will share with you soon. How to use it. Clarify

In those examples, they're both fine. They will both convey the same message. Here's how:
1. (This message is) For those who have been asking me about the tips ...
2. (I am saying this) To those who have been asking me about the tips ...
The parts that are in ( ) will be assumed by the listener/reader. Since it's colloquial English (i.e., not overly formal), the listener/reader will know exactly what you're trying to say. It's not a matter of pure grammar; it's more of a preference.

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