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Every game has some quests for which you will receive Soul Gems.
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There are a lot of bots adding users as friends, with NSFW profile pictures, advertising NSFW sites, where they can set which city they live in. Here is my idea: Instead of freely writing there anything, you would have the ability to choose from a list of cities from your country. I know this might be hard to add since there are millions of cities, so if that's not possible, instead of cities, you could choose from states, counties, etc. In my opinion, this shouldn't be hard to add, since there are already a lot of websites that only allow selecting existing cities.