If the OP really just wants a forum poster, then a one time fee of $97 is of course a more economical buy than $50 per month. But only as long as you do not use it and have no costs for captcha solving
VenomSEO has captcha solving capabilities that should be quite good based on reviews. For scrapeboard you would have to pay for a decaptcha service (I think the included captcha solver that some beta versions came with has been removed?). And that could of course get expensive if you want to use scrapeboard a lot. So it really depends on how much you are going to use it.