Think about the time savings. If it saves you more than 10 hours of development and maintenance time, pays for itself, even if you don't have a single customer.
How many pointless purchases do we all make each month? I buy 2-3 domains per month for ideas. 90% of them just sit there.
I have 4 droplets at digital ocean just sitting there and 1 actually being used. Its the opportunity cost of losing them.
That is why God/IRS invented write-offs. If you use it, great, if not, well at least it's pre-tax!