The one time a company did this here it was beautiful. Loopnet was set up this way in the beginning. So if you only needed one report, you could just buy that one and not have to worry about recurring charges or unused time. The alternative is to never sign up for anything and watch as promising, potentially useful stuff dies on the vine. That's been my approach lately as the other way is too much hassle for a small scale, single-user. If all of SaaS is only meant for corps with 50 seats or more...it's going to get nasty out there because people aren't forming companies like they used to..and lean teams are the future.