Hello!
I've asked mnrank.com about listing of XLR and there is their answer:

Hello,

Listing information:


To add your coin to the queue without any expected time frame just write all the info to contact address. As an option, we offer a priority listing (~24h) for a donation.

For priority listing a coin there is a few requirements:
- Coin must be listed on Coinmarketcap (if not, individual requirements).
- Listing fee is 0.05 BTC/year in your coin equivalent.

I think, listing here would be good step to gain popularity for our coin.
@SolarisDev, what do you think? Would you mind giving them 0.05 BTC for XLR listing?