Answer 1

If you're talking about challenges that expire, it would be nice to gain a little bit of XP, maybe around 5 or 10, as long as the other person doesn't lose any XP themselves and you don't gain a substantial amount, as that would get a little unfair.

If you have any suggestions, you could send an email to Sololearn at [e-mail], where people usually take suggestions like these into consideration.