I used TER several years ago. Then I didn't use it for several years. And now I use it once again (I didn't even remember the account information and had to get a new one when I started using TER again). I never posted on my previous/expired account. A few things to consider/my two cents ...
1) If I am in a serious relationship, then I will not see any escorts (similarly, if I ever do get married, then I will be faithful to my wife and I will not see any escorts, unless we discuss that topic and she is open to the idea).
2) Everyone interprets white lists differently. I have had a lady or two white list me because she wanted to see me again and/or because she wanted me to write a positive review and/or because I am just a nice guy. Some people think that it isn't appropriate to provide and/or ask for a white list unless you have seen a lady multiple times. Also, most agencies cannot white list guys. Additionally, ladies who do not have VIP accounts may not be able to white list a guy. Furthermore, some ladies have a policy of not white listing anyone (for such noble reasons as "white lists create a conflict of interest" or simply because "other guys may see that and start asking for one").
3) Right now, I don't have the time or desire to get into a serious relationship and I am enjoying the hobby. My only regret is that I would like to find a few ladies that I really connect with and become a regular. Not dating won't last forever, however. I am just focused on achieving various personal goals right now and don't have time for serious relationships. I could see a lot of guys and ladies going back and forth --- for a variety of reasons. So I wouldn't find a break of a year or longer all that abnormal.
Net, I would consider just sending him a PM with a few clarifying questions. Give him the opportunity to make you feel comfortable. Shift the burden to him. These sound like legitimate concerns. But concerns that could be allayed.