Bootman the ban on paying players will pretty much eliminate overseas players at your level. Assuming the overseas lads don't pay for their own flights then the money men pulling out would have the same effect. I think its fair to say that if any club relies on a dozen overseas players, to stay at the level they are at, then if they all get pulled out the club is likely to drop like a stone. (hence the reason why my post was caveated with "if this is actually the case, and not just mischievous speculation"
For information in case you missed it the RFU class providing flights, accommodation or the offer of employment directly linked to playing rugby for a particular club as Payment. Any players concerned who this applies to, domestic or overseas, have to be registered with the RFU as a contracted players, with significant penalties being handed out when this is not the case.