Expired numbers on tracphones

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Hi all.

I used tracphones as a way to obtain a verifiable phone number for my stealth accounts that I created. However, now the numbers have expired, but the extra minutes are $20 for 3 months (I think), and doing this across all my stealth accounts starts to add up to a decent amount of money. I'm not usre if I can even add minutes to a tracphone with an expired number, so maybe I need a different sim card or...??

I'm just a little confused what the best thing to do is now that my phone numbers on my tracphones are expired, and what I should do from the get-go for my next stealth accounts. Is there a better way to keep a verifiable phone number on your stealth accounts?

I appreciate the help.