I have been an Alaska Airlines passenger for decades. Without my knowledge (they say they sent me an email to warn me but it never arrived), they canceled my account with more than 20,000 FF miles in it because I hadn't flown with them in 2 years. Ridiculous.
To get them back, I would either have to pay them $75 or sign up for one of their credit cards (I do not like credit cards and pay with cash whenever possible).
This company used to have character and stood out from the crowd with its customer service. Today, it's a shadow of its former self. Disappointing customer service, antiquated policies (expiring miles? charging for checked baggage?) and an unwillingness to help a long-standing customer.
I recommend you use another airline. Or at least, use another FF program. Delta, in which I've had points for years, has not canceled my account. Others clearly appreciate their passengers more than Alaska Airlines. And that is unfortunate.