In that case I don’t think there’s much more you can do except for mining cryptocurrency, which without consent is quite immoral, and not that efficient without many users.
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Apart from this do I have any other option?
Ads I guess. But IMO they kinda suck. You could also just try to ask for donations.
I already have the donate button. But none of my customers have donated anything :)
I'm also checking this Amazon Affiliate program now.
In that case I don’t think there’s much more you can do except for mining cryptocurrency, which without consent is quite immoral, and not that efficient without many users.