the value of their LLL:com portfolio might be 50 million, 100 million or more. They simply don't need to deal with lowball offers. Their time is worth something and $19 is not much. So nearly anyone who is serious about buying a domain can afford contacting them. I think $19 is still very approachable. If they ask for a minimum offer price spammers will offer $1000 for an LLL.com being worth at least $30.000. If they ask for a 100k minimum on an offer page TM holders can use that against them claiming that they are trying to sell their TM for a lot of money.