Oh yeah, I have had the 'I'm not very good at keeping in touch' friends too, where I have been the one to contact them all the time! It's exasperating. And like you, when I stopped doing the contacting, they never bothered with me. Never contacted me. I never heard from them again.
I did have a friend some years ago who had been a work colleague for a couple of years, and when she left the workplace, we stayed in touch. We went for coffees together, and pub lunches with our husbands, day trips together, and even a couple of day trips with our husbands. (We didn't start the socialising together til about 6 months before she left the workplace, and carried it on for about a year after she left....)
After about 3 years of knowing her (and about 18 months into socialising with her (and sometimes her DH and my DH,) she moved house.
However..... She didn't tell me she was moving. I phoned her one day (hadn't seen her for about a month, and had only spoken to her twice in that time,) and the line was dead. I was so confused. I actually drove to her house that was 10 miles away, and there were new people in it. They had no idea where the old occupiers had gone. (It was private let.)
There was no Facebook or anything then, so I had no way to message her...
tl;dr I found out some months later (from a mutual acquaintance) that she had moved 20 miles away, and hadn't told me where she was going as she didn't want to stay in touch, as she was pissed off with me. I said 'what? why? What have I done?'
Turned out she was pissed off with me, because her husband fancied me. He had mentionitis, and kept talking about me and what a laugh I was, and how he couldn't believe how I'd still got such a good figure after birthing 2 children! He said I was lovely and bubbly and friendly.
So she ghosted ME, because her husband was a womanising letch.
In the circumstances I would possibly have wanted less contact with a friend my husband fancied, but she had somehow made it my fault that HE fancied me. I would also be looking at my marriage and if I still wanted to be in it, if my husband was raving over another woman - and a woman that was a friend of mine!
Yep, I never heard from her again. Don't even know if she is still with her DH.