I would focus on improving the most frustrating tools, when you think "I should be getting this shit done in 2 seconds and it's taking me 2 hours". The image webapp was just an example that happened to me recently
I would add that for many of these tools the blockers are: creating an account, adding a card (and especially the time to consider whether to subscribe or not to the regular SaaS), navigating through stupid ads, evalutate if it's worth giving them your e-mail, etc. Both LN payments and/or LNURL-Auth can make things way better. No BS, just value for value
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