Well... Personally I don't really care what people advertise on their profiles. I usually don't click on them anyways
.. And as for expiration of members, well perhaps that shouldn't be done to people with over like 250 posts. I mean you can't expect people to be here all the time. Even once a week. Personally, I am not here sometimes 3-4 days at a time. And I know there are people who come much less frequently.
If they are contributing members, it's a shame if their username gets taken by someone else, or if their post count gets deleted.. Assuming its important to them.. I couldn't care less about the post count personally. lol.. There are more important things to achieve in life than to have a high post count on TF..